LEJEUNIA - Lichens of Belgium, Luxembourg and northern France

LEJEUNIA 

REVUE DE BOTANIQUE 

Nouvelle série N° 173 Août 2003 

____________________________________________ 

Abstract 

NEW OR INTERESTING LICHENS AND 

LICHENICOLOUS FUNGI FROM BELGIUM, 

LUXEMBOURG AND NORTHERN FRANCE. IX 

by 

Emmanuël SÉRUSIAUX (1) , Paul DIEDERICH (2) , 

Damien ERTZ (3) & Pieter VAN DEN BOOM (4) 

With the extension of the area covered by the checklist of the lichens and 

lichenicolous fungi of Belgium and Luxembourg (DIEDERICH & SÉRUSIAUX, 2000) 

to the Boulogne and Picardy districts in NW France, and together with the results 

presented in this paper, the list of species present in that area now includes 1214 

accepted taxa. 39 species of lichens and lichenicolous fungi are new records for the 

study area: Abrothallus caerulescens, A. cladoniae, Agonimia gelatinosa, Arthonia 

digitatae, Bagliettoa parmigerella, Bryoria capillaris, Celothelium ischnobelum, 

Cladonia cyathomorpha, Dinemasporium strigosum, Epigloea renitens, Intralichen 

baccisporus, Kalaallia reactiva, Lasiosphaeriopsis salisburyi, Lecanactis dilleniana, 

Lecanora leuckertiana, L. zosterae, Lecidea siderolithica, Leiorreuma lyellii, Neolamya 

peltigerae, Opegrapha gyrocarpa, Parmelia ernstiae, Peltigera extenuata, P. monticola, 

Phacopsis fusca, Polydesmia lichenis, Pronectria oligospora var. octospora, P. 

pertusariicola, Ramonia interjecta, Rimularia insularis, Roselliniella atlantica, 

Stigmidium aggregatum, S. mycobilimbiae, S. peltideae, Trichonectria anisospora, 

Unguiculariopsis thallophila, Verrucaria elaeina, V. hegetschweileri, V. papillosa and 

Xanthoria ulophyllodes, whilst the presence in that area is confirmed for Clauzadea 

(1) Life sciences Dept., University of Liège, Sart Tilman B22, B-4000 Liège, Belgium 

(E.Serusiaux@ulg.ac.be). 

(2) Musée national d’histoire naturelle, 25 rue Munster, L-2160 Luxembourg, Luxembourg 

(paul.diederich@education.lu). 

(3) National Botanical Garden, Domaine de Bouchout, B-1860 Meise, Belgium 

(damien.ertz@br.fgov.be). 

(4) Arafura 16, NL-5691 Son, the Netherlands (pvdboom@zonnet.nl).

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chondrodes, Endocarpon adscendens, Epilichen scabrosus and Paranectria oropensis. 

Bryoria implexa, Cliostomum corrugatum, Phacopsis oxyspora, Rhizocarpon plicatile 

and Vouauxiella verrucosa have to be deleted from that flora. New data are presented for 

rare or overlooked species, and further information on the nomenclature or taxonomy 

now adopted is given for several taxa. Two new combinations are proposed: Tremella 

caloplacae (bas. Lindauopsis caloplacae) and Trichonectria anisospora (bas. Nectriella 

anisospora). A neotype is chosen for Epicladonia stenospora. 

Résumé: Lichens et champignons lichénicoles nouveaux ou intéressants pour la flore 

de la Belgique, du Luxembourg et du nord de la France. IX. 

Avec l’extension du territoire étudié dans la checklist des lichens et des champignons 

lichénicoles de Belgique et du Luxembourg (DIEDERICH & SÉRUSIAUX, 2000) aux districts 

boulonnais et picard dans le NW de la France, et avec les résultats présentés dans cet 

article, la liste des espèces présentes dans ce territoire comprend maintenant 1214 

taxons acceptés. 39 espèces de lichens et de champignons lichénicoles sont nouvelles 

pour le territoire étudié: Abrothallus caerulescens, A. cladoniae, Agonimia gelatinosa, 

Arthonia digitatae, Bagliettoa parmigerella, Bryoria capillaris, Celothelium 

ischnobelum, Cladonia cyathomorpha, Dinemasporium strigosum, Epigloea renitens, 

Intralichen baccisporus, Kalaallia reactiva, Lasiosphaeriopsis salisburyi, Lecanactis 

dilleniana, Lecanora leuckertiana, L. zosterae, Lecidea siderolithica, Leiorreuma 

lyellii, Neolamya peltigerae, Opegrapha gyrocarpa, Parmelia ernstiae, Peltigera 

extenuata, P. monticola, Phacopsis fusca, Polydesmia lichenis, Pronectria oligospora 

var. octospora, P. pertusariicola, Ramonia interjecta, Rimularia insularis, Roselliniella 

atlantica, Stigmidium aggregatum, S. mycobilimbiae, S. peltideae, Trichonectria 

anisospora, Unguiculariopsis thallophila, Verrucaria elaeina, V. hegetschweileri, V. 

papillosa et Xanthoria ulophyllodes, tandis que la présence de Clauzadea chondrodes, 

Endocarpon adscendens, Epilichen scabrosus et Paranectria oropensis est confirmée. 

Bryoria implexa, Cliostomum corrugatum, Phacopsis oxyspora, Rhizocarpon 

plicatile et Vouauxiella verrucosa doivent être supprimés de cette flore. De nouvelles 

données sont présentées pour des espèces rares ou méconnues, et des informations 

complémentaires sur la taxonomie adoptée aujourd’hui sont données pour plusieurs 

taxons. Deux combinaisons nouvelles sont proposées: Tremella caloplacae (bas. 

Lindauopsis caloplacae) et Trichonectria anisospora (bas. Nectriella anisospora). Un 

néotype est choisi pour Epicladonia stenospora. 

INTRODUCTION 

This paper continues the series of notes on the flora of lichens and their 

lichenicolous fungi in Belgium and Luxembourg (SÉRUSIAUX et al., 1999) and 

thus provides further additions or changes to the checklist of the species present 

in that area (DIEDERICH & SÉRUSIAUX, 2000). It includes a summary of the recent 

literature pertinent to the species present, incl. that pertaining to taxonomic or 

nomenclature changes for the species concerned, and the results obtained on 

previously overlooked collections and recently collected material. Under the 

enumeration of specimens, (h) denotes the private herbarium of the collector. 

Other abbreviations and symbols are the same as those used by DIEDERICH &

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SÉRUSIAUX (2000): * denotes a lichenicolous fungus, (*) a lichenicolous lichen, 

+ a non-lichenized and non-lichenicolous fungus; B, L and F denote the 

countries Belgium, Luxembourg and France respectively; Ard., Lorr., Mosan, 

etc. denote the phytogeographical districts. 

Subsequently to an extensive study of the lichen flora of the ‘Boulonnais’ in 

northern France (SPARRIUS et al., 2002), the authors of the Checklist (DIEDERICH 

& SÉRUSIAUX, 2000) decided to expand the study area of this checklist to the 

Boulogne and Picardy districts, entirely including the departments Nord, Pasde-Calais 

and Somme in France. In a recent paper, TOUSSAINT et al. (2002) 

redefined the borders of the Boulogne, Picardy and Brabant districts in 

northern France, and we follow this new subdivision strictly. 

RECENT LITERATURE PERTINENT TO THE STUDY AREA 

Since the previous paper published in this series (SÉRUSIAUX et al., 1999) 

and the publication of the checklist (DIEDERICH & SÉRUSIAUX, 2000), the 

following contributions to the lichen and lichenicolous flora of the study area 

or relevant to their taxonomic status have been published: 

MARBACH (2000) revises the tropical and subtropical Buellia s. l. species and 

accepts a much narrower genus concept with 13 distinct genera. As long as the 

phylogeny of the European members of the genus has not been critically reexamined, 

we prefer to continue to treat the genus in its broad sense, including 

Amandinea and other recent segregates. 

APTROOT et al. (2001a) distinguish the new species Cladonia monomorpha 

Aptroot, Sipman & van Herk in the C. pyxidata aggregate and report the species 

from several localities in Belgium, Luxembourg and northern France. It is mostly 

found on acid soil and siliceous rocks. Further attention should thus be paid to this 

group of species in the study area to assess their ecology and local distribution. 

APTROOT et al. (2001b) investigate the occurrence of several recently 

described species from the Netherlands in adjacent countries, incl. part of the 

area dealt with in this paper. They report the following as new for Luxembourg: 

Bacidia (syn.: Bacidina) neosquamulosa, Placopyrenium trachyticum, 

Verrucaria macrostoma, and Verrucaria ochrostoma (however, the latter three 

were already known from that country; see DIEDERICH & SÉRUSIAUX, 2000: 

144, 173 & 174). They also strongly suggest that the material called Lecidella 

conspurcatosorediosa (Harm.) Diederich is merely a corticolous form of the 

more widespread and saxicolous L. scabra (Taylor) Hertel & Leuckert. 

Although it has no major significance for the list of species found in the area 

of study, the paper by GEEBELEN & HOFFMANN (2001) is worth mentioning as 

their evaluation of bio-indication methods using epiphytes by correlating with 

SO 2 -pollution parameters is based on studies in the northern part of Belgium.

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The most outstanding checklist of the lichens of Austria (HAFELLNER & TÜRK, 

2001) introduces important nomenclatural changes, as well as the assignment of 

many species to new genera. The following are relevant for the area dealt with in this 

paper: Mycobilimbia epixanthoides (Nyl.) Vitik. et al. (syn.: Biatora epixanthoides), 

M. lurida (Ach.) Hafellner & Türk (syn.: Psora lurida), M. pilularis (Körb.) 

Hafellner & Türk (syn.: Biatora sphaeroides); Myxobilimbia Hafellner with M. 

lobulata (Sommerf.) Hafellner (syn.: Mycobilimbia lobulata) and M. sabuletorum 

(Schreb.) Hafellner (syn.: Mycobilimbia sabuletorum); Psoroglaena abscondita 

(Coppins & Vĕzda) Hafellner & Türk (syn.: Macentina abscondita). They use the 

name Protoparmeliopsis muralis (Schreb.) M. Choisy for the common Lecanora 

muralis; we find this proposal pre-mature, as a detailed phylogenetic study of the 

entire genus Lecanora should in our opinion precede any taxonomic changes. The 

new combination Fuscidea fagicola (Zschacke) Hafellner & Türk is introduced for 

the corticolous form of F. cyathoides [also known as var. corticola (Fr.) Kalb], but the 

genuine identity of such populations in our area requires further studies. 

SANTESSON (2001) has validly published Lichenopeltella hydrophila R. Sant. 

in his Fungi Lichenicoli Exsiccati n° 319; the type collection originates from 

the area of study (Luxembourg). 

SÉRUSIAUX et al. (2001) describe the new corticolous species Fellhanera 

gyrophorica Sérus., Coppins, Diederich & Scheidegger from several localities 

of well-preserved forests in Central Europe. It was reported as Fellhanera sp. 

in DIEDERICH & SÉRUSIAUX (2000: 101). In the study area, it is known from two 

localities in the Berdorf area in Luxembourg (Lorr. district). 

In a detailed phylogenetic analysis of the lichenicolous fungi belonging 

to Hobsonia, Illosporium and Marchandiomyces, SIKAROODI et al. (2001) 

found that Hobsonia christiansenii B. L. Brady & D. Hawksw. (DIEDERICH & 

SÉRUSIAUX, 2000: 104) must be transferred to the new genus Illosporiopsis D. 

Hawksw., related to hypocrealean ascomycetes. They also demonstrate that 

both species of Marchandiomyces reported from the area of study (DIEDERICH 

& SÉRUSIAUX, 2000: 121) form a clade and are genuine basidiomycetes. 

VAN DEN BOOM & COPPINS (2001) describe the new species Micarea 

viridileprosa Coppins & van den Boom as a corticolous, lignicolous or 

terricolous species on acid substrata in western Europe. In the checklist 

(DIEDERICH & SÉRUSIAUX, 2000: 125) it was included in M. prasina Fr. which 

was said to include two different species. It could be rather widespread in 

the area of study, at least in the Mosan, Ard. and Lorr. districts. It hosts the 

lichenicolous ascomycete Nectriopsis micareae Diederich, van den Boom & 

Ernst, known from the Camp. and Mar. districts. 

Material of Protoparmelia oleaginea (Harmand) Coppins, collected in 

2001 in Belgium (Ard.: Nassogne, J6.28, dupl. in LG) on Quercus by P. van 

den Boom, was distributed in Vĕzda Lichenes Rariores Exsiccati n° 460. The 

species is new for the area of study.

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The proposal to conserve Bacidina Vĕzda against Lichingoldia D. Hawksw. & 

Poelt and Woessia D. Hawksw. & Poelt has been adopted by the Committee for 

Fungi (Taxon 50: 269, 2001). It must however be remembered that an older genus 

name has meanwhile been detected for this group of species, viz. Lopacidia Kalb 

(KALB et al., 2000: 282). It should also be noted that a detailed phylogenetic 

study of the Bacidiaceae by EKMAN (2001) demonstrates that most of the species 

included in Bacidina or Woessia, incl. the type of Woessia, form a clade, whilst 

B. phacodes, the type of Bacidina, may or may not be included in this group. We 

suggest that no additional nomenclatural changes should be proposed as long as 

the monophyly of the entire group has not been proved definitely. 

COPPINS & VAN DEN BOOM (2002) describe the new Bacidia brandii Coppins 

& van den Boom, growing on various substrates (ground, brick, lignum and 

plant debris) and found in the Netherlands, Belgium, France and Lithuania. 

DIEDERICH et al. (2002) describe the new genus and species of lichenicolous 

coelomycetes Cladoniicola staurospora Diederich, van den Boom & Aptroot, 

growing on several species of Cladonia, mainly in heathlands. The species is 

reported from the Mar. district. 

EKMAN & TØNSBERG (2002) study the phylogeny of Lepraria and Leproloma 

using molecular sequences. They demonstrate that most species of the two genera 

form a monophyletic group closely related to Stereocaulon, and that both genera 

cannot be separated. They furthermore find that Lepraria flavescens belongs to 

Lecanora (but no nomenclatural change is proposed), and that Botryolepraria 

lesdainii and L. obtusatica are both not related to Lepraria. In another paper, 

TØNSBERG (2002) introduces the new name Lepraria flavescens Cl. Roux & 

Tønsberg for L. flavescens Clauzade & Cl. Roux nom. inval. 

LEUCKERT et al. (2002) mention Lepraria eburnea from Belgium (Ard. 

district). This species was previously known from a single Belgian record 

(DIEDERICH & SÉRUSIAUX, 2000). 

MOLINA et al. (2002) use molecular data to demonstrate that Diploicia and 

Diplotomma form a monophyletic clade and are distinct from other Buellia 

species. Diplotomma should therefore be treated as a distinct genus. The 

authors also suggest that Diploicia should be considered as a synonym of 

Diplotomma; we hesitate to accept this as both genera are monophyletic in the 

phylogeny proposed by these authors. 

REDHEAD et al. (2002) describe the new genus Lichenomphalia Redhead et 

al. to accommodate the lichenized species formerly included in Omphalina. 

Two species from Belgium and Luxembourg are concerned: L. hudsoniana 

(H. S. Jenn.) Redhead et al. (syn.: O. hudsoniana) and L. umbellifera (L.: Fr.) 

Redhead et al. (syn.: O. umbellifera). 

ROUX & GUEIDAN (2002: 147-148) show that Buellia epipolia auct. and B. 

venusta (Körb.) Lettau are two distinct species, and that the oldest valid name for B.

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epipolia auct. is Buellia hedinii H. Magn. The populations present in our study area 

all belong to B. hedinii. The name has not yet been combined in Diplotomma. 

ROUX et al. (2002) show that Polyblastia deminuta Arnold, known from the 

Mosan district in Belgium, is a non-lichenized, lichenicolous fungus growing 

on endolithic, often poorly developed lichens, and that it belongs to the genus 

Merismatium. They introduce the new combination M. deminutum (Arnold) 

Cl. Roux & Nav.-Ros. 

SPARRIUS et al. (2002) have studied in detail the lichen flora of the Boul. district 

in northern France (LAMBINON et al., 1998; TOUSSAINT et al., 2002), as well as 

the southern part of the Mar. district and the most north-western parts of the 

Pic. district. The area covered by the checklist (DIEDERICH & SÉRUSIAUX, 2000) 

is expanded to include those areas. The following species are thus reported as 

new for the area of study: Bacidia laurocerasi, Caloplaca cerinelloides, C. 

marina, C. microthallina, C. thallincola, Chrysothrix flavovirens, Cladoniicola 

staurospora (see above), Cliostomum flavidulum, Cryptolechia carneolutea, 

Didymellopsis collematum, Gyalidea minuta, Lecania atrynoides, Lecanora 

jamesii, Lichina confinis, Mycomicrothelia confusa, Opegrapha sorediifera, 

Verrucaria erichsenii, V. halizoa, V. maura and V. sandstedei. They further 

demonstrate that Cliostomum corrugatum does not occur in the study area. 

STAIGER (2002) presents a remarkable revision of the Graphidaceae and a 

more natural genus delimitation. A few species known from our study area are 

concerned. Graphis britannica Staiger is a new name for Graphina anguina 

auct. europ. The genus Phaeographis is only partly treated by this author, as 

a complete treatment is planned to be published separately. Amongst the four 

species known from the study area, she accepts P. dendritica (type species 

of the genus) and transfers P. lyellii to Leiorreuma Eschw. as L. lyellii (Sm.) 

Staiger. Phaeographis smithii and P. inusta are not treated. 

THÜS (2002) revises the aquatic Verrucaria species from Central Europe. He 

mentions Verrucaria praetermissa from the Ard. district in Belgium. 

VANBRUGGHE et al. (2002) report the discovery of Usnea articulata in France, 

Pas-de-Calais, near Montreuil-sur-Mer (Mar. district, G22.27) in 1996. They 

furthermore mention an older record of the same species in France, Pas-de- 

Calais, between Fruges and Créquy (Pic. district, G21.15) in 1972. 

DIEDERICH & SÉRUSIAUX (2003) describe the new Stromatopogon cladoniae 

Diederich & Sérus., an extraordinary lichenicolous fungus growing on 

Cladonia polydactyla in Belgium (Ard. district). 

DIEDERICH et al. (2003) report the discovery of the teleomorph of 

Marchandiomyces aurantiacus, for which they introduce the new genus and 

species name Marchandiobasidium aurantiacum Diederich & Schultheis. The 

genus is close to Waitea Warcup & P. H. B. Talbot and is tentatively included 

in the Ceratobasidiales.

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ERTZ (2003) presents a detailed study of the saxicolous and terricolous lichen 

flora from 29 selected, calcareous sites from the Belgian Mosan district. A total 

of 198 species of lichens and lichenicolous fungi were recorded, including 

Collema coccophorum Tuck., new for the study area, and Lempholemma 

chalazanum (Ach.) B. de Lesd., confirmed for that area. 

VAN DEN BROEK (2003) presents a lichen inventory of 10 cemeteries near Antwerp. 

A total of 90 species are recorded, varying from 26 to 67 per cemetery. 

A re-appraisal of the European members of the Cladonia cervicornis group 

by VAN HERK & APTROOT (2003) let the authors conclude that the three known 

taxa, often treated as subspecies of a single species, deserve species rank. 

These are: Cladonia cervicornis (Ach.) Flot. s. str., C. pulvinata (Sandst.) van 

Herk & Aptroot and C. verticillata (Hoffm.) Schaer. 

*Abrothallus caerulescens Kotte 

RESULTS 

Luxembourg, Ard.: Bourscheid, along road to Ettelbruck, near Michelau (K8.45), W 

exposed schistose outcrops along road, on Xanthoparmelia conspersa, 10.2002, P. & B. 

van den Boom 29891 (h). 

The lichenicolous genus Abrothallus is in urgent need of a modern taxonomic 

revision. As long as no such revision is available, we prefer to call all specimens 

on Xanthoparmelia A. caerulescens, although we are aware that the delimitation 

of this species is not yet entirely clear. New for the study area. 

*Abrothallus cladoniae R. Sant. & D. Hawksw. 

Luxembourg, Lorr.: W of Kayl, Monument des mineurs (M8.53), vertical shaded boulder, 

on Cladonia pyxidata ssp. pocillum, 10.2002, P. & B. van den Boom 29867 (h). 

A lichenicolous ascomycete new for the study area. 

Agonimia gelatinosa (Ach.) Brand & Diederich 

France, Mar.: Somme, au NW de St-Valéry-sur-Somme, pointe du Hourdel, à l’E du 

phare, levée de galets (H22.44), sur sable et mousses recouvrant des galets, 7.2001, P. 

Diederich 15358 (h); au N d’Ault, à 800 m au NW de la ferme d’Onival, à 200 m de la 

mer (J22.22), sur de la terre recouvrant des galets, 7.2001, P. Diederich 15278 (h). 

The species grows with other interesting terricolous lichens, like Agonimia 

globulifera, A. tristicula, A. vouauxii, Toninia sedifolia and Verrucaria bryoctona. 

It is new for the study area. 

*Arthonia digitatae Hafellner 

Luxembourg: S. loc., on Cladonia subulata, before 1850, F.-A. Tinant 659 (LUX).

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This species was recently described as an aggressive parasite on the 

squamules of the primary thallus of Cladonia digitata (HAFELLNER, 1999). 

Our specimen grows on a different host, C. subulata, mainly apically on the 

podetia, and does not visibly damage the host. 

A short description follows: ascomata blackish, 50-125 μm in diam.; 

exciple thin and pale; hymenium and hypothecium pale; epihymenium pale, 

but darkened through the presence of a brown parasitic hyphomycete; pigment 

K- or more olivaceous or greyish; hymenium K/I+ pale blue, reaction week, 

possibly due to the age of the specimen; paraphyses short-celled, branched, 

irregular, almost contorted, 2.5-4.5 μm thick, apically not swollen nor 

pigmented; asci at least 5-spored, elongate ellipsoid, 21-29 × 8.5-12 μm; 

ascospores hyaline, becoming pale brownish when overmature, 1-septate, 

constricted at septum, 10.3-12.5 × 4-4.5 μm. 

Morphologically, our specimen is very similar to the published description of 

A. digitatae. An alternative could be Lecidea epicladonia Nyl., a poorly known 

species possibly belonging to Arthonia (ALSTRUP & HAWKSWORTH, 1990). For the 

moment, we prefer to call our specimen A. digitatae, but we are aware that the 

discovery of more specimens of Arthonia on different Cladonia species, and a 

subsequent revision of that material, might lead to a different conclusion. 

Bacidia neosquamulosa Aptroot & van Herk 

Belgium, Fl.: Wilrijk, Kerkhof Steytelinck (C4.36), on Populus, 12.2002, D. Van 

den Broek (hb Diederich). – Ard.: W of Gedinne, along étang de Boiron (K5.17), on 

branches of Picea, 5.2000, P. van den Boom 24359 (h); Nassogne, near water-tower 

(J6.27), square with Fraxinus, 5. 2001, P. van den Boom 26448 (h). 

This species was known from a single locality in B Fl. (DIEDERICH & 

SÉRUSIAUX, 2000: 177) and was also reported from L Lorr. (APTROOT et al., 

2001b). It might be rather common and widespread in the area of study, as 

suggested by the additional collections from B Fl. and Ard. 

Bagliettoa parmigerella (Zahlbr.) Vězda & Poelt 

Belgium, Mosan: Huy, éperon rocheux à l’entrée du vallon du ruisseau de Solières (SE 

de Bas-Oha) (G6.14), rocher calcaire compact ombragé en sous-bois, 3.2002, D. Ertz 

650 (LG). 

Luxembourg, Lorr.: Lasauvage, rocher de tuf calcaire dans le village (M7.48), 9.1999, 

P. Diederich 13886 (h). 

New for the study area. 

Bryoria capillaris (Ach.) Brodo & D. Hawksw. 

Belgium, Ard.: ‘sur les arbres dans le bois de Sourbrodt’ (G8.25), before 1830, M. 

A. Libert s. n. (BR, with B. fuscescens); Reinartzhof (F9.35), sur Quercus en futaie,

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11.1960, A. Froment s. n. (LG); Petit Bongard, rive droite de la Helle (F8.55), sur Betula 

pubescens, 7.1969, R. van Hulst s. n. (LG); 10 km SE of Laroche, N of Le Cheslin (J7.25), 

small Quercus on steep, rocky W-slope, 4.1985, A. M. Brand 14403b (hb Brand). 

The checklist (DIEDERICH & SÉRUSIAUX, 2000: 75) reports two species of 

Bryoria which require examination of relevant material: B. chalybeiformis (L.) 

Brodo & D. Hawksw. and B. implexa (Gyeln.) Brodo & D. Hawksw. Such 

material has now been carefully studied, incl. by TLC. 

The material refered to B. implexa actually belongs to B. capillaris. The 

earlier report of that species from Luxembourg (DIEDERICH, 1986: 118, as B. cf. 

capillaris) refers to Ramalina thrausta (SÉRUSIAUX et al., 1999: 73-74). 

Bryoria capillaris is a corticolous species, only found in B Ard.; it might be 

extinct in the area of study, but further exploration of suitable localities might 

demonstrate that it is still present. New for the study area. 

Bryoria chalybeiformis (L.) Brodo & D. Hawksw. 

Belgium, Ard.: ‘à terre parmi les rochers à Bastogne’ (K7.16), 1852, E. Coemans (BR); 

Kreus im Venn (N de Küchelscheid, à promixité de la frontière allemande) (G8.16), partie 

humide et moussue de l’escarpement rocheux, 10.1960, J. Lambinon 60/2200b (LG). 

The material previously refered to that species actually belongs to it, and its 

presence in the study area is thus confirmed. 

This saxicolous species is believed to be extinct in the area of study. 

Buellia ocellata (Flot.) Körb. 

Belgium, Fl.: Moerkerke centre, brick wall along churchyard (C2.14), on brick of wall, 

4.2000, P. van den Boom 24281 (h). 

France, Mar.: Somme, au NW de St-Valéry-sur-Somme, pointe du Hourdel, à l’E du 

phare, levée de galets (H22.44), sur des galets, 7.2001, P. Diederich 15371 (h); ibid., 

4.2003, E. Sérusiaux s. n. (LG). 

Netherlands: Noord-Brabant, Middelbeers, churchyard, on tombstone of acid rock, 

7.1987, P. van den Boom 5672 (h). – Zeeland, Schouwen, Burgh-Haamstede, brick wall 

along church, on brick, 5.1988, P. van den Boom 6797 (h). 

Within the study area, this species was known only from one locality in F 

Mosan, where it occurs on natural siliceous rocks. It was also mentioned from 

Belgium (DUVIGNEAUD & GILTAY, 1938: 39), but no relevant specimen has been 

seen. Its presence in Belgium is here confirmed. The species is widely distributed 

in the Netherlands, and two records close to the Belgian border are mentioned 

here. In France (Somme), we collected it twice on pebbles near the sea. 

Bunodophoron melanocarpum (Sw.) Wedin 

Belgium, Ard.: vallée de la Helle, rocher à la Brandehaag (F8.55), 3.1967, P. De Zuttere 

67/3468 (LG).

-10- 

DIEDERICH & SÉRUSIAUX (2000: 77) say that the species report from B Ard. 

is based only on litterature and that no specimen is available. A collection 

found in LG demonstrates that the species was indeed present in that district. It 

has not been seen recently and may now be extinct. 

Caloplaca granulosa (Müll. Arg.) Jatta 

Belgium, Mosan: Comblain-la-Tour, ‘Thier des Pourcès’ (G7.33), on calcareous rock in 

a S exposed grassland on the righ side of the Ourthe, 2.2002, D. Ertz (field observation); 

W of Vieuxville, ruins of château ‘Fort de Logne’ (G7.52), on S exposed old wall, 

5.2001, P. van den Boom 26579 (h, LG); Modave, ‘Thier de la Croix’ (G6.36), crête 

rocheuse calcaire en voie de reboisement spontané, 3.2002, D. Ertz 787 (LG); Hansur-Lesse, 

Belvédère (J6.24), dry and S-exposed limestone outcrop with Xerobromion 

communities, 12.2001, D. Ertz s. n. (LG); NE of Dailly, Gros Tienne du By (J4.47), 

semishaded calcareous ridge, 3.2002, D. Ertz s. n. (LG). 

The species was formerly known from a single locality in northern France 

in the Mosan district (DIEDERICH & SÉRUSIAUX, 2000: 80). It is new for Belgium, 

where it might be more common than previously expected. 

Celothelium ischnobelum (Nyl.) Aguirre 

Belgium, Ard.: Warche valley (G8.35), on Corylus, 5.1993, J. Linnert s. n. (hb Aptroot, 

LG). 

This is a very much unexpected finding as Celothelium ischnobelum is a 

rare species in Europe and seems to be mostly restricted to atlantic and wellpreserved 

areas. It once again demonstrates the high patrimonial value of the 

Warche valley and the urgent need for stronger conservation. 

Cladonia cyathomorpha W. Watson 

Belgium, Ard.: WSW of Gedinne, rocher Campa (K5.37), schistose outcrops, 5.2000, 

P. van den Boom 24402 (h); Willerzie, Rochers de la Marotelle (K5.16), 11.1984, E. 

Sérusiaux 6692 (LG). 

Luxembourg, Ard.: vallée de la Wark, à 2 km au N de Warken (au NW d’Ettelbruck) (K8.44), 

sur une paroi subverticale ombragée schisteuse en bord de route, 3.1997, P. Diederich 12462 

(LG, h). – Lorr.: s. loc., before 1880, J.-B. Reinhard 678 (LUX); Moesdorf, im Walde beim 

Scheuerhof (L8.25), zwischen Moosen, 2.1892, J. Feltgen 421 (LUX); Klingelscheuerhof 

(L8.46), 6.1888, J. Feltgen 422 (LUX); Fischbach, vers Plankenhof, près des étangs 

(L8.36), dans un talus en bord de route, 11.1980, P. Diederich 3481 (h). 

France, Ard.: Ardennes, SE of Revin, S of Anchamps, rocher des Dames, path along 

Meuse (K5.33), vertical shaded wet schistose rock, 5.2000, P. van den Boom 24429 (h). 

Quite interestingly, a careful examination of Cladonia collections yielded a 

further, and rather easy to determine, species in the area of study.

-11- 

*Cladoniicola staurospora Diederich, van den Boom & Aptroot 

Belgium, Camp.: Kalmthout, Kalmthoutse Heide, close to the educational center of the 

nature reserve (B4.27), terricolous in heathland, on Cladonia, 11.2001, P. Diederich 

14977 (h); ENE of Zonhoven, nature reserve ‘De Teut’ (D6.38), terricolous in 

heathland, on C. chlorophaea, 11.2001, P. Diederich 15024 (h). 

Luxembourg, Lorr.: entre Dudelange et Kayl, Haard (M8.54), sur de la terre, sur 

Cladonia pyxidata ssp. pocillum, 7.2002, P. Diederich 15495 (h), J. Miadlikowska & 

D. Ertz. 

This lichenicolous coelomycete has just been described from the 

Netherlands and northern France (DIEDERICH et al., 2002) and is here newly 

recorded from Belgium and Luxembourg. 

Clauzadea chondrodes (A. Massal.) Clauzade & Cl. Roux 

Belgium, Mosan: Yvoir, rocher de Champalle (H5.27), calcareous outcrops, 11.1999 

& 12.2001, D. Ertz s. n. & 423 (LG); Comblain-la-Tour, ‘Thier des Pourcès’ (G7.33), 

on calcareous rock in a S exposed grassland on the righ side of the Ourthe, 2.2002, D. 

Ertz 504, 504bis (LG); W of Vieuxville, calcareous grassland of Logne (G7.52), on a 

calcareous rock in a S exposed grassland on the righ side of the Limbrée, 2.2002, D. 

Ertz 508 (LG); SE of Huccorgne, rocher de la Marquise (F6.54), calcareous rock in a 

grassland at the top of an outcrop, on the left side of the Mehaigne, 3.2002, D. Ertz s. n. 

(LG); Han-sur-Lesse, Les Grignaux, W of the Ry d’Ave (J6.34), dry and SE-exposed 

limestone outcrop, 5.1997, P. Diederich 12753 (h). 

DIEDERICH & SÉRUSIAUX (2000: 92) claim that this species report from Belgium 

by DUVIGNEAUD & GILTAY (1938) is based only on litterature and that no specimen 

is available. The above mentioned specimens recently collected demonstrate that 

the species was probably overlooked or mistaken for other species of Clauzadea. 

Dr Barbara Meyer kindly checked the identity of two collections. 

Clauzadea cyclisca (A. Massal.) V. Wirth, another taxon reported, but not 

accepted from the study area (DIEDERICH & SÉRUSIAUX, 2000: 92), is considered 

to be a regeneration form of Clauzadea chondrodes in the recent monograph 

of the genus by MEYER (2002). Most Belgian specimens partly or entirely 

represent such regeneration forms. 

*Clypeococcum epicrassum (H. Oliv.) Nav.-Ros. & Cl. Roux 

Belgium, Mosan: Dourbes, roche à Lomme (J5.41), calcareous rock in Xerobromion 

communities, 2.2002, D. Ertz 443 (LG); Comblain-la-Tour, ‘Thier des Pourcès’ 

(G7.33), on calcareous rock in a S exposed grassland on the righ side of the Ourthe, 

2.2002, D. Ertz 502 (LG). 

This lichenicolous ascomycete was formerly known from a single locality 

in Belgium in the Lesse valley (VAN DEN BOOM et al., 1999). It has recently been 

collected in two other localities in the Mosan district on Squamarina cartilaginea.

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*Corticifraga peltigerae (Nyl.) D. Hawksw. & R. Sant. 

Luxembourg, Lorr.: entre Dudelange et Kayl, Haard (M8.54), sur de la terre, sur Peltigera 

rufescens, 7.2002, P. Diederich 15490 (h), J. Miadlikowska & D. Ertz; W of Kayl, Monument 

des mineurs (M8.53), on P. rufescens, 10.2002, P. & B. van den Boom 29875 (h). 

Within the study area this species was known only from two old records 

(< 1880) from B Ard. (DIEDERICH & SÉRUSIAUX, 2000: 95). It is new for Luxembourg. 

*Dinemasporium strigosum (Fr.) Sacc. 

Luxembourg, Lorr.: entre Dudelange et Kayl, Haard (M8.54), sur de la terre, sur 

Peltigera rufescens, 7.2002, P. Diederich 15493 (h), J. Miadlikowska & D. Ertz 2529 

(BR); Lorentzweiler, Kiischtebierg (L8.45), dans une lande siliceuse, sur Peltigera 

hymenina, 11.1983, P. Diederich 3961 (h). 

This is a common coelomycete, mostly, but not exclusively, growing on 

graminaceous substrates (SUTTON, 1980). The repeated discovery of the fungus 

on thalli of Peltigera (see also MIADLIKOWSKA & ALSTRUP, 1995) suggests that 

these populations might represent a distinct, yet undescribed, lichenicolous 

species. More and richer collections are needed to ascertain this hypothesis. Nonlichenicolous 

specimens are known from Belgium, e.g.: Belgium, Ard.: Malmedy 

(G8.43), on Deschampsia flexuosa, s. d., M. A. Libert, Reliquiae Libertianae n°23 

(BR). We did not check the Belgian mycological literature to see if the species was 

already published from this country. In any case, the species must be added to the 

checklist of lichens and lichenicolous fungi (DIEDERICH & SÉRUSIAUX, 2000). 

Endocarpon adscendens (Anzi) Müll.Arg. 

Belgium, Mosan: 2 km N of Villers-sur-Lesse, in front of entrance to Château Royal 

(J6.13), S exposed mossy slope in ditch, 5.2001, P. van den Boom 26495 (h). 

Both previously known specimens of this species from the study area, 

preserved in LG, were re-checked and found to represent E. pusillum Hedw. 

However, a recently collected Belgian specimen proved to be the genuine E. 

adscendens (identification confirmed by Dr O. Breuss). The presence of this 

species in the study area is thus established. The species was growing close to 

Protopannaria pezizoides. 

*Epicladonia stenospora (Harm.) D. Hawksw. 

Bull. Br. Mus. Nat. Hist. (Bot.) 9: 20 (1981); Aposphaeria stenospora Harm., Lich. Fr. 

3: 308 (1907). Type: not indicated in the original account (type lost ? ANGUC–, fide 

HAWKSWORTH 1981). 

Luxembourg, Lorr.: NW of Steinfort, carrières (L8.51), alt. 320 m, sur de la terre, 

sur Cladonia furcata subsp. furcata, 1.2000, J. M. Cepeda 46a (LG – neotype, here 

designated; LUX, UPS, hb Diederich – isoneotypes).

-13- 

Belgium, Camp.: ENE of Zonhoven, nature reserve ‘De Teut’ (D6.38), terricolous in 

heathland, on basal squamules of Cladonia chlorophaea, 11.2001, P. Diederich 15021 (h). 

Following HAWKSWORTH (1981), the type specimen of this species could 

not be located, and only a single additional specimen from Austria was known 

to that author. We here select the rather rich Luxembourg collection mentioned 

above as a neotype. We have furthermore seen material of this species from 

Austria: F. Berger 6296 (h, hb Diederich), and Lithuania: J. Motiejūnaitė 3733 

(BILAS, hb Diederich). HAWKSWORTH (1986) reported it from Scotland. 

In the neotype specimen, the fungus is abundant on the podetia of the host, 

but does not induce the formation of galls. The pycnidia are 40-80(-120) µm 

in diam., first immersed, later partly erumpent. The conidia are aseptate or 

more rarely 1-septate (c. 10% of the conidia observed), hyaline, multiguttulate, 

always narrower in the middle, 9-10 × 3.5-4 µm; the conidial wall is c. 0.4 

µm thick and the basal scar 0.8-1.7 µm. The Austrian specimen studied and 

described by HAWKSWORTH (1981) has 0(-1)-septate conidia of 7.5-11 × 3-3.5 

µm, which are always broader in the middle. Whether these two specimens are 

conspecific, or that two different species are involved should only be discussed 

when more and richer specimens are available, allowing a better knowledge of 

the variability of the conidia. The Belgian specimen cited above has conidia of 

7-9 × 2.5-3 µm, which are distinctly broader in the middle, and is thus similar 

to the Austrian specimen described by HAWKSWORTH. 

Within the study area, the species was previously known from Belgium 

(Mosan and Lorr.) on Cladonia coniocraea and C. rangiformis. 

+Epigloea renitens (Grummann) Döbbeler 

Belgium, Mosan: Plombières, parc de l’ancien site minier (E8.52), Armeria-heathland, 

on piece of hardwood, 4.2001, L. B. Sparrius 4669 (h, hb Diederich). 

Netherlands, Camp.: Budel-Schoot (NB), near former railway station, on rail track 

(grid-ref. 57-36-33), 10.1999, L. B. Sparrius 3521 (h). 

This non-lichenized fungus was known from Austria and Germany, and possibly 

also from the British Isles (DÖBBELER, 1984), and is therefore new for the study area. 

(*)Epilichen scabrosus (Ach.) Clem. 

Belgium, Mosan: Plombières, parc de l’ancien site minier (E8.52), Armeria-heathland on 

zinc-containing slate, on humus rich soil, on Baeomyces rufus, 4.2001, L. Sparrius 4679 (h). 

The specimen is quite reduced, but clearly shows the yellowish lichenized 

thallus developing over the thallus of Baeomyces rufus. This thallus does not show 

any orange fluorescence in UV, probably due to its young age. All other characters 

are typical for E. scabrosus: yellowish, lichenicolous thallus, convex, immarginate 

ascomata, olivaceous brown epihymenium being K-, a dark olivaceous brown

-14- 

hypothecium, strongly branched and anastomosing paraphyses, asci with a KI+ 

blue tholus, and brown, 1-septate ascospores of 12-16 × 5.5-7.5 µm. This species 

differs from the similar, but much rarer E. glauconigellus (Nyl.) Hafellner by the 

yellowish thallus and the immarginate ascomata. 

This lichenicolous lichen had already been reported from Luxembourg on 

Baeomyces rufus by KOLTZ (1897: 253), but no relevant specimen has been 

examined. The presence of the species in the study area is herewith confirmed. 

Fellhanera viridisorediata Aptroot, Brand & Spier 

Belgium, Mar.: NE of Brugge, W of Het Zwin, mixed wood (B2.33), abundant on fallen 

trunks of Pinus pinaster, 4.2000, P. van den Boom 24246 (h, fertile). – Ard.: Malmedy, 

vallée du Trô Maret (G8.23), fourrés de Vaccinium sur replats au-dessus de la rivière, 

10.2000, E. Sérusiaux s. n. (LG, hb Diederich); Harre, bois de Harre, vallée de l’Ai 

l’Oiseau (H7.15), branchettes de Picea en bordure d’une prairie de fond de vallée, 

10.2000, E. Sérusiaux s. n. (LG); Nadrin, lieu-dit ‘Les Ondes’ (J7.15), lisière très 

humide d’une plantation de Picea, sur branchettes de Picea, 4.2000, E. Sérusiaux s. n. 

(LG); Bure, vallée de la Lomme, au lieu-dit ‘Grand Han’ (J6.45), branchettes de Picea 

en lisière d’une plantation, 1.2001, E. Sérusiaux s. n. (LG); Bohan, boucle de la Semois 

au NE du lieu-dit ‘Le Châtelet’ (K5.57), lisière fraîche d’une plantation de Picea, sur 

branchettes de Picea, 7.2001, E. Sérusiaux s. n. (LG); S of Beauraing, Gedine, S of road 

to Rienne, along ‘Etang Boiron’ (K5.17), on twigs of Picea, 5.2000, P. van den Boom 

24357 (h, fertile). – Lorr.: 6.5 km NE of the centre of Virton, 3 km NNE of Ethe, 1.5 

km N of the Etang de Laclaireau, forest close to stream (M7.24), on Picea twigs by a 

stream, 9.2002, P. Diederich 15532 (h) & D. Ertz 2647 (BR). 

This species was known from two Belgian collections only and was 

considered to be probably overlooked (DIEDERICH & SÉRUSIAUX, 2000: 101). 

Careful search for the species demonstrates that it must be quite common, 

being most commonly found on Picea twigs at the edges of shaded and humid 

plantations (where it is frequently found with Fellhanera bouteillei and 

Fellhaneropsis myrtillicola), and once at the base of Vaccinium shrubs together 

with Vulpicida pinastri (syn.: Cetraria pinastri) . 

*Intralichen baccisporus D. Hawksw. & M. S. Cole 

Belgium, Mar.: au NW de Veurne, vers Sint-Idesbald, Ten Bogaarde Hoeve (C0.57), 

vieux murs autour de la ferme près du parking, sur briques et mortier, sur Caloplaca 

citrina, 5.2002, P. Diederich 15242 (h). 

Luxembourg, Lorr: Strassen, Xaviershaff (M8.14), sur un mur vertical d’une vieille 

ferme, sur C. citrina, 7.1998, P. Diederich 13728 (h). 

Netherlands: Limburg, Maastricht, stadsmuur t. h. v. de Nieuwenhofstraat, vestingmuur van 

tufkrijt (km blok 61-28-32, 176.3/317.2), on C. citrina, 5.1998, P. Diederich 13640 (h). 

Germany: Bayern, Reg.-Bez. Mittelfranken, Landkreis Neustadt a. d. Aisch, Schloß 

Hoheneck östlich Ipsheim, am Weg nördlich Bühlberg, 430 m, auf C. flavovirescens, 

1.1977, N. Höhne (HBG).

-15- 

Austria: Niederösterreich, Lunz am See, Scheiblingstein, 1500-1600 m, auf Kalk, auf 

C. alociza, 8.1995, R. Türk 20291 (h, hb Diederich). 

This species has just been described from a single specimen from the USA 

on Caloplaca trachyphylla (HAWKSWORTH & COLE, 2002), and is here newly 

recorded from Europe, where it could be a common parasite in the hymenium 

of Caloplaca species. 

*Kalaallia reactiva Alstrup & D. Hawksw. 

Belgium, Ard.: Bovigny, vallée de l’Eau de Ronce (affluent rive gauche de la Salm) 

(H8.41), sur pierres immergées ou immédiatement au-dessus de la surface de l’eau, sur 

Ionaspis lacustris, 6.1997, E. Sérusiaux (LG). 

This lichenicolous ascomycete was described from Greenland (ALSTRUP & 

HAWKSWORTH, 1990) and was recently reported from the British Isles (ORANGE, 

2002). It is new for the study area. 

*Lasiosphaeriopsis salisburyi D. Hawksw. & Sivanesan 

Luxembourg, Lorr.: Lamadelaine, Fusboesch (M8.31), sur Peltigera didactyla, 7.2002, D. 

Ertz 2554, P. Diederich & J. Miadlikowska (BR, specimen with Neolamya peltigerae). 

France, Brab.: Pas-de-Calais, à l’W de Watten, Blockhaus d’Eperlecques (E21.27), sur 

un gros bloc de béton exposé, sur P. rufescens, 5.2002, P. Diederich 15149 (h). 

Netherlands: Noord-Holland, Heemskerk dune area near Berenweide, on path, on calcareous 

sandy soil (coord. 103.5/503.5), on P. rufescens, 6.1990, A. Aptroot 26821 (h). 

This lichenicolous ascomycete was described from the British Isles, and 

was subsequently collected in the Faroes and Spain, always on Peltigera 

species (MARTÍNEZ & HAFELLNER, 1998). Its recent inclusion in the Dutch 

checklist (APTROOT et al., 1999) is based on the specimen given above. The 

species is new for the study area. 

Lecanactis dilleniana (Ach.) Körb. 

Belgium, Ard.: Malmedy, along Warche river (G8.35), boulder in scree, 5.2003, A. 

Aptroot 57899a (h, hb Diederich). 

A remarkable discovery of a rare species, known from Central Europe, the 

British Isles and Scandinavia. New for the study area. 

Lecanora compallens van Herk & Aptroot 

Belgium, Ard.: Redu, along road to the river Lesse (K6.14), on Tilia along the road, 

5.2000, P. van den Boom 24483 (h, LG). 

Luxembourg, Lorr.: Schouweiler, vers Bascharage, à 1,2 km après la sortie du village, 

le long de la route principale (M8.22), sur Tilia, 9.1999, P. Diederich 13854 (h); au S de

-16- 

Bertrange, route entre Gréivelserhaff et Gréivelser-Barrière (M8.24), sur Tilia, 9.2000, 

P. Diederich 14397 (h). 

Lecanora compallens is a further species that should turn out to be quite 

common; as it is always sterile, it is easily overlooked. It was formerly known from 

few localities in B Mosan and L Lorr. (DIEDERICH & SÉRUSIAUX, 2000: 109). 

Lecanora crenulata Hook. 

Selected specimens examined: Belgium, Mar.: au NW de Veurne, vers Sint-Idesbald, 

Ten Bogaarde Hoeve, vieux murs autour de la ferme près du parking (C0.57), 5.2002, P. 

Diederich 15235 (h); au SW de Veurne, à l’W de Bulskamp, St Gustaafmolen (D0.27), 

5.2002, P. Diederich 15251 (h). – Brab.: Zwalm, Roborst, church (E3.23), 8.1999, P. 

Diederich 13929 (h) & M. Hoffmann (with L. dispersella). – Mosan: Han-sur-Lesse, 

Les Grignaux, W of the Ry d’Ave (J6.34), 5.1997, P. Diederich 12752 (h). 

Luxembourg, Lorr.: Lasauvage, dans le village (M7.48), sur un rocher en tuf calcaire, 

9.1999, P. Diederich 13882 (h). 

France, Picard: Somme, à 6 km au NW d’Abbeville, Port-le-Grand, grande ferme fortifiée 

au centre du village (J22.17), 7.2001, P. Diederich 15400 (h). – Lorr.: Meuse, au SE de 

Montmédy, Marville, cimetière de St Hilaire (N7.11), 11.2000, P. Diederich 14465 (h). 

DIEDERICH & SÉRUSIAUX (2000: 109) explained that the name Lecanora 

crenulata is used for two very distinct species. Although we did not examine 

the type specimen of L. crenulata, we considered that the name should be used 

for the species with the larger apothecia. No name appeared to be available 

for the species with smaller apothecia, which we provisionally called ‘L. 

crenulata auct.’. In some recent papers (e. g., LLIMONA & HLADUN, 2001; 

NAVARRO-ROSINÉS, 1992: 193-195; NIMIS & POELT, 1987), the species with 

smaller apothecia is called Lecanora dispersella auct. We propose to follow 

this choice until a modern revision of the group is available. 

Lecanora dispersella auct., non Steiner 

Syn.: Lecanora crenulata auct., non Hook. 

Selected specimens examined: Belgium, Brab.: Geraardsbergen, Chappel Oudenberg 

(E3.45), on the wall of a church (calcareous stones, mortar, etc.), 8.1999, Diederich 

13913 (h) & M. Hoffmann; Zwalm, Roborst, church (E3.23), on the wall of a church 

(mortar), 8.1999, P. Diederich 13929 (h) & M. Hoffmann (with L. crenulata). 

Luxembourg, Lorr.: NE Kehlen, cimetière de Schéimerech (L8.54), sur un vieux mur, 

et sur de vieilles tombes, 9.1997, P. Diederich 12946 (h); Mamer, Tossebierg, près des 

thermes romains (M8.14), sur un mur, 11.1997, P. Diederich 13448 (h); Larochette, 

près de la ferme Weydert (L8.27), sur Sorbus domestica, 5.1998, Diederich 13623 (h). 

France, Mar.: Pas-de-Calais, Ambleteuse, Ancien Fort Mahon, face nord, murs près de 

l’entrée du Fort (E22.35), sur un mur, 8.2000, P. Diederich 14394 & J. Signoret (h).

-17- 

Netherlands: Limburg, Bemelen, Bemelerberg (km blok 62-21-23, coord. 182.1/318.1), 

kalkgrasland met tufkrijtrotsen, 5.1998, P. Diederich 13691 (h); Cadier en Keer, 

Schiepersberg, Julianagroeve (km blok 62-21-53, coord. 182.7/315.8), sur une roche 

calcaire dans une carrière, 5.1998, P. Diederich 13647 (h). 

U.S.A.: Nevada, W of Las Vegas, Red Rock Canyon National Conservation Area, 

sandstone quarry (36°10’ N, 115°27’ W), alt. 1290 m, on non-calcareous sandstone 

rocks in an old quarry, 12.1997, P. Diederich 14156 (h). 

See comments under Lecanora crenulata. 

Lecanora leuckertiana Zedda 

Belgium, Mosan: SE of Gendron, along the river Lesse (H6.51), on W exposed steep 

calcareous rock, 3.1995, P. van den Boom 16706 (h, LG); Villers-sur-Lesse, S of 

Château Royal (J6.13), calcareous outcrops, on vertical face, 5.2001, P. van den Boom 

26580 (h, LG). – Ard.: 2.5 km N of Smuid, 200 m W of rocher de Marie de Gobaille 

(J6.56), vertical, shaded, schistose rock, 5.2000, P. van den Boom 24519 (h, LG). 

This recently described species (ZEDDA, 2000) is sterile and easily identified 

by its unusual combination of common compounds (usnic acid and zeorin). 

Both specimens from the Mosan district cited above have been checked by 

TLC and definitely belong to that species. Lecanora leuckertiana is thus new 

for the study area. 

Lecanora piniperda Körb. 

Belgium, Ard.: Gedinne, Croix Scaille (K5.26), 5.2000, P. van den Boom 24408 (h); 

SW of Eupen, Hertogenwald, path from Brackvenn to Nahtsief (F8.56), on dead 

standing decorticated trunk, 9.2001, P. & B. van den Boom 27983 (h). – Lorr.: SE of 

Florenville, forêt d’Orval, along stream ‘Frère Simon’ (L6.58), on wood of fence post, 

4.1998, P. van den Boom 20053 (h). 

This species was known from L Ard. et Lorr. (DIEDERICH & SÉRUSIAUX, 

2000: 110) and is here newly recorded for Belgium. 

Lecanora zosterae (Ach.) Nyl. 

France, Mar.: Pas-de-Calais, Cran aux Oeufs, top of cliff near village (E22.14), on 

stems and branches of Lycium barbarum, 6.2001, P. Diederich 14878 (LG, h). 

Netherlands: Frise, Schiermonnikoog, près du port, sur un poteau en bois dans la mer, 

4.1984, P. Diederich 5364 (h). 

This species was recently recognized in the British Isles, where it mainly 

develops on decaying rosettes and leaves of Armeria maritima, and more rarely 

on decaying leaves of other plants, always over rocks and soil close to the sea 

(LAUNDON, 2003). In North America it is common on lignum and dead vegetation 

(BRODO et al., 2001). It is new for the study area and for the Netherlands.

Lecidea siderolithica Müll. Arg. 

-18- 

Belgium, Ard.: Stavelot, vallée de l’Amblève, rocher de Challe (G8.52), paroi siliceuse 

fortement enrichie en métaux lourds, 8.1997, E. Sérusiaux s. n. (LG); ibid., 3.1998, M. 

Minet, E. Sérusiaux & P. van den Boom (LG, hb van den Boom). 

France, Ard.: Ardennes, bois de Fumay, le long de la route entre Fumay et Revin, paroi 

schisteuse subverticale fortement ferrophile, 6.1967, J. Lambinon 67/345 (LG); ibid., 

7.1978 (excursion de l’Association Française de Lichénologie 1978), R. Iserentant & 

E. Sérusiaux (LG, hb Iserentant). 

These collections have been examined by the most distinguished specialist of 

the genus Lecidea, Dr H. Hertel, and were found to be close to Lecidea siderolithica 

Müll. Arg. Several anatomical details however bring them somewhat apart from 

it, but no alternative name could be found. L. siderolithica belongs to the Lecidea 

fuscoatra aggr. and needs further investigations; typical populations are known 

from the British Isles, France and Germany (HERTEL, 1995: 171). 

The rock substrate at both localities is strongly enriched with iron and 

typical ferrophilous lichen communities develop: at the Rocher de Challe in 

Stavelot, Acarospora sinopica is the dominant species while yellow Lecanora 

are lacking; at the Fumay locality, Lecanora epanora is very abundant, 

together with Acarospora sinopica, Lecanora handelii and L. subaurea. The 

species is new for the area covered by the checklist. 

Leiorreuma lyellii (Sm.) Staiger 

Syn.: Phaeographis lyellii (Sm.) Zahlbr. 

France, Pic.: Somme, au N d’Abbeville, forêt domaniale de Crécy, lots 35-37 (H21.41), 

alt. 75 m, sur Carpinus dans une forêt, 7.2001, P. Diederich 15089 (h). 

See comments under Phaeographis dendritica. New for the study area. 

Leptogium byssinum (Hoffm.) Nyl. 

Belgium, Mosan: Oret (près de Mettet), hameau de Coroy (H5.32), carrière de sable, 

2.2003, J.-P. Duvivier (h) & D. Ertz 3040 (BR, LG, hb Diederich). 

This species was known from a single Belgian locality in the Mar. district 

(DIEDERICH & SÉRUSIAUX, 2000: 117), and is here reported as new for the Mosan 

district. It covers a surface of 1-2 m 2 at the edge of a quarry, where it grows in 

open grass vegetation over clay. 

Leptogium teretiusculum (Wallr.) Arnold 

Belgium, Ard.: Villers-Sainte-Gertrude, au N du village, vallée du ruisseau de Pont-le- 

Prêtre (H7.13), sur Juglans, dans un pâturage, 4.2001, E. Sérusiaux s. n. (LG). 

This species was known from five Belgian and two Luxembourg saxicolous 

collections (SÉRUSIAUX et al., 1999). The new record is most interesting, as it is 

the first corticolous population in the study area.

-19- 

*Libertiella malmedyensis Speg. & Roum. 

Luxembourg, Lorr.: entre Dudelange et Kayl, Haard (M8.54), sur Peltigera gr. 

rufescens, 7.2002, D. Ertz 2497 (BR), P. Diederich & J. Miadlikowska. 

Within the study area, this species was known only from B Ard. (type 

locality), where it was collected in 1880 (DIEDERICH & SÉRUSIAUX, 2000). It is 

new for Luxembourg. 

Lichina confinis (Müller) Agardh 

France, Mar.: Pas-de-Calais, near cap Gris-Nez (E22.14), on sandstone rocks with large 

populations of Verrucaria maura, 5.2002, P. Diederich 15140 (h, LG). 

This species was collected several times on a single rock near cap Gris- 

Nez (E22.15) between 1951 and 1994, and it seems to have disappeared since 

(SPARRIUS et al., 2002). We report here the discovery of a second, very healthy 

population, covering rocks over a surface of more than 20 × 5 m 2 . As the 

species is extremely rare in our region, we do not give further details on the 

exact location of the population, to avoid overcollecting. 

Lobarina scrobiculata (Scop.) Cromb. 

Belgium, Ard.: near Herbeumont, vallée de l’Antrogne (L6.25), tronc d’un gros Acer, 

1.2003, D. Ertz 2907 (BR). 

This species was considered as possibly extinct in Belgium, as it has not 

been observed since 1991 on a tree that was eventually removed (DIEDERICH 

& SÉRUSIAUX, 2000: 121). It has been rediscovered in Belgium on a single tree 

of 90 cm in diam. in an old forest near Herbeumont. This species requires a 

special conservation program. 

(*)Milospium graphideorum (Nyl.) D. Hawksw. 

Belgium, Mosan: Han-sur-Lesse, Belvédère (J6.24), sheltered limestone outcrop, 

12.2001, D. Ertz s. n. (LG); SE of Nismes, ‘Roche Trouée’ (J5.41), sheltered limestone 

outcrop, 3.2002, D. Ertz s. n. (LG); Treignes, vallée du Ruisseau des Fonds de Ri, lieu-dit 

‘Roche aux chevaux’ (J5.33), affleurement de calcaire compact du Givetien en bord de 

rivière, 5.1999, D. Ertz s. n. (LG), E. Sérusiaux s. n. (LG) & P. Diederich 14219 (h). 

This species was included in the recent Checklist (DIEDERICH & SÉRUSIAUX, 

2000: 125), based on one of the above mentioned collections, but no specimen 

has been published until now. The species is relatively rare in the Mosan 

district, and grows exclusively in association with Dirina stenhammarii as 

a lichenicolous fungus: occasionally it becomes independent and sometimes 

develops a distinct blackish prothallus separating it from its initial host. 

Corticolous specimens of the same species known from other countries are 

usually non-lichenicolous independent lichens (APTROOT & SIPMAN, 2001; also 

specimens in hb Diederich examined).

-20- 

*Neolamya peltigerae (Mont.) Theiss. & Syd. 

Luxembourg, Lorr.: Lamadelaine, Fusboesch (M8.31), sur Peltigera didactyla, 7.2002, 

P. Diederich 15479 (h), J. Miadlikowska & D. Ertz 2535 (BR); entre Dudelange et 

Kayl, Haard (M8.54), sur Peltigera didactyla, 7.2002, P. Diederich 15487 (h), J. 

Miadlikowska & D. Ertz. 

A rare, but widespread peltigericolous ascomycete, here reported as new 

for the study area. 

Opegrapha gyrocarpa Flot. 

Belgium, Ard.: Sainte-Cécile, vallée de la Semois, entre le lieu-dit Relogne et les 

rochers face à la roche du Chat (L6.36), parties ombragées de parois siliceuses, 

partiellement en sous-bois, 7.1997, E. Sérusiaux s. n. (LG) (TLC: gyrophoric et 

schizopeltic ac.); Nisramont, confluence des Deux-Ourthes, rive gauche, au N du lieudit 

‘Steignon Chaineu’ (J7.25), barre rocheuse en bord de l’Ourthe et en sous-bois, 

4.2000, E. Sérusiaux s. n. (LG) (TLC: schizopeltic ac.). 

Opegrapha gyrocarpa is easily identified by its yellowish orange color 

and the production of schizopeltic acid, sometimes produced together with 

gyrophoric acid. Both collections are sterile and were checked by TLC. The 

species is new for the area of study. 

*Paranectria oropensis (Ces.) D. Hawksw. & Piroz. 

Luxembourg, Lorr.: Lamadelaine, Fusboesch (M8.31), on Fagus, on Lepraria 

lobificans, 7.2002, D. Ertz 2522 (BR), P. Diederich 15484 (h) & J. Miadlikowska. 

This species was tentatively reported from Luxembourg (SÉRUSIAUX et 

al., 1999) based on an immature specimen overgrowing Buellia punctata and 

Xanthoria candelaria. The report of a fully mature collection allows us to 

ascertain the occurrence of the species in the study area. 

Parmelia ernstiae Feuerer & A. Thell 

Belgium, Mosan: Namur, rochers (schistes houillers) au pied de la citadelle, entre le pont de 

l’Evêché et le pont de Sambre (G5.36), 6.1961, J. Lambinon 61/635 (LG); Macon, route de 

Chimay (J4.53), sur Ulmus, 8.1962, J. Duvigneaud 62/521 (LG); Baileux, bois de baileux, 

au-dessus du “Chemin des Liégeois” (J4.56), sur Quercus en futaie, 5.1964, J. Lambinon 

64/448 (LG); Roly, bord de l’étang du Fraity (J5.21), saussaie marécageuse, sur Salix mort, 

12.1972, E. Sérusiaux 29 (LG); Loverval, route de Philippeville (G4.57), à l’entrée du bois, 

sur Ulmus, 11.1959, J. Lambinon 59/622 (LG); Dinant, Fonds de Leffe (H5.38), tronc de 

Fraxinus en bord de ruisseau, 9.1961, J. Lambinon 61/2205 (LG); Biron, vergers au bord 

de la route Barvaux-Hotton (H7.21), sur arbres fruitiers, 1.1960, J. Lambinon 60/21 (LG); 

Froidchapelle, bois de Hermoy (J4.25), futaie claire, tronc de Quercus, 2.1964, J. Lambinon 

64/68 (LG); Rance, forêt de Rance, aulnaie à sphaignes en bordure de la route de Beaumont 

(J4.24), sur Alnus, 9.1964, J. Lambinon 64/1569 (LG); Thirimont, verger en bord de la 

route Beaumont-Mons (H4.43), vieux tronc de cerisier, 9.1964, J. Lambinon 64/1518 

(LG); Theux, route de Liège-Spa, à la limite de Louveigné (G7.17), tronc de Fraxinus,

-21- 

8.1962, J. Lambinon 32/1470 (LG). – Ard.: Mormont, pierrier de la limite communale de 

Chêne-al-Pierre (Pierry del Fagne Houbier) (H7.23), sur bloc rocheux, 9.1961, J. Lambinon 

61/2159 (LG); Erezée, vallée de l’Aisne (H7.33), sur Fraxinus, 1.1960, J. Lambinon 60/ 

30 (LG); Herbeumont, Rocher du Chat (L6.26), sur Betula, 8.1959, J. Duvigneaud s. n. 

(LG); ibid., sur Quercus, J. Duvigneaud s. n. (LG); Assenois-lez-Neufchâteau, propriété 

du Comte d’Ansembourg (L7.11), sur tronc d’Ulmus, 6.1960, J. Lambinon 60/1064 (LG); 

entre Anlier et Habay-la-Neuve (L7.35), tronc de Fraxinus en bord de route, 7.1964, J. 

Lambinon 64/1013 (LG); Grimbiemont (comm. de Roy) (J6.18), vieux tronc de pommier 

(haie en bordure de prairie), 5.1964, J. Lambinon 64/336 (LG); Noville, Wicourt, le long de 

la route Bastogne-Houffalize (J7.46), tronc de Fraxinus, 5.1964, J. Lambinon 64/432 (LG); 

entre Bütgenbach et Waismes, au bord de la route de Malmedy (G8.46), tronc de Sorbus 

aucuparia, 11.1962, J. Lambinon 62/2078 (LG); Gembes, banc rocheux (schiste dur) au 

bord du ruisseau des Rives, près de la route de Porcheresse (K6.12), 7.1962, J. Lambinon 

62/783 (LG); route de Morhet (K7.23), sur Fraxinus, 4.1960, J. Ramaut s. n. (LG); Marbay, 

route Neufchâteau-Arlon, près du carrefour de la route Marbay-Bernimont (L7.12), sur 

Picea en bord de route, 3.1960, J. Ramaut s. n. (LG); St-Hubert, route de Champlon, près 

du pénitencier (J6.57), sur Acer pseudoplatanus, 5.1964, J. Lambinon 64/653 (LG); Naomé, 

“Mon Idée” (route de Bouillon, limite de Baillamont) (K6.32), tronc de Picea, 9.1964, J. 

Lambinon 64/1581 (LG). – Lorr.: Tintigny, bord de la route de Bellefontaine (L7.52), tronc 

de Fraxinus, 9.1962, J. Lambinon 62/1824; Sainte-Marie-sur-Semois, bord de chemin près 

du calvaire (L7.53), tronc de Populus, 9.1962, J. Lambinon 62/1769 (LG); SE of Etalle, S of 

Sivry, bois d’Etalle (L7.54), on Quercus, P. & B. van den Boom 30643 (h, hb Diederich). 

Luxembourg, Ard.: Asselborn, entre Emeschbaach et Moulin d’Asselborn (J8.32), sur un 

rocher en schistes, 8.1980, P. Diederich 2751 (h). – Lorr.: NNW of Contern, Weierboesch 

(M8.27), on Quercus, 9.1987, P. Diederich 8621 (h, LD, LG); Rodange, Prënzebierg 

(M8.31), on Betula, abandoned old quarry with Betula and Salix trees, 5.2003, P. 

Diederich 15601 (h); SW of Larochette, Meysembourg (L8.26), on roadside Aesculus, 

5.2003, P. & B. van den Boom s.n. (h); Larochette, vallon du Manzebaach (L8.27), tronc 

de Fagus abattu, 9.1966, J. Lambinon 66/1538 (LG); Berdorf, sur la crête du Perekop 

(escarpement de grès de Luxembourg) (L9.12), 6.1961, J. Lambinon 61/536 (LG); N 

Mamer, près du Fonkebiirchen (L8.53), sur Quercus, 7.1980, P. Diederich 2266 (h); SW 

Kopstal, Neimaxmillen, près d’un ancien étang (L8.54), sur Tilia, 7.1980, P. Diederich 

2253 (h); S Rambrouch (L7.18), sur Fraxinus, 9.1979, P. Diederich 1911 (h); E Vichten, 

route vers Bissen (L8.13), sur Tilia, 9.1979, P. Diederich 1817 (h); E Heisdorf (L8.56), 

dans un verger, 7.1979, P. Diederich 1497 (h); N Ernster (L8.47), sur Malus, 7.1979, 

P. Diederich 1390 (h); S Eisenborn, près des étangs (L8.46), sur un arbre, 7.1979, P. 

Diederich 1506 (h); S Capellen, près d’un étang dans forêt (M8.13), sur Quercus, 7.1980, 

P. Diederich 2246 (h); Luxembourg, parc W Radio (M8.15), sur Platanus, 11.1966, L. 

Reichling (LUX); Vichten (L8.13), vers 1890, J. Feltgen 172 (LUX). 

France, Mosan: Ardennes, rochers de Chooz, au-dessus de Petit-Chooz (J5.35), rochers 

schisto-gréseux ± calcareux d’un petit abrupt sous la crête, 5.1970, J. Lambinon 70/449 

(LG). – Moselle, 12 km E of Bitche, Grosser Hundskopf [réserve naturelle des rochers 

et tourbières du pays de Bitche: rock 20], on Quercus, 7.2001, P. Diederich 14829 (h) & 

J. Signoret. – Vosges, E de La Bresse, chemin allant du col de Brammont vers le col de 

l’Etang, 950-1100 m, futaie à Abies et Acer, 6.1987, E. Sérusiaux s. n. (LG). – Finistère, 

forêt de Cranou, près de la route de St Conval, sur branche de Quercus, 5.1960, R. 

Schumacker s. n. & J. Lambinon 60/678 (LG). – Pyrénées-Atlantiques, Iraty, forêt au

-22- 

NE des “Châlets d’Iraty”, 1200-1300 m, futaie de hêtres, 7.1989, P. W. James, F. Rose, 

J. Vivant & E. Sérusiaux s. n. (LG). 

Germany: Bez. Nordhessen, grossflächig an senkrechten, teilschattigen, feuchtgetönten 

grobkörnigen Basalttuffwänden im Parmelietum omphalodis, 500 m, Felsabbrüche 

zwischen Dörnberg und Helfensteinen im Naturpark Habitchtwald westlich Kessel, 

4.1972, G. Follmann Lichenes Exsiccati selecti a Museo Historiae Naturalis Casselensis 

editi n° 308 (LG, hb Diederich). 

Greece: Thessaly, Litochoron, Olympus, Stavros, 1000 m, on Pinus, 8.1984, P. van den 

Boom 2083 (h); ibid., Mt Olympus, 2100 m, on Pinus, 7.1984, P. van den Boom 1944; 

chaîne du Pinde, route de Kalambaka à Ioannina, 28 km avant Metsovon, 15 km avant 

le col, 1500 m, bois de pin, sur tronc, 8.1962, V. Demoulin (LG). 

Slovenia: Alpes Juliennes, Bohinj, sur Larix en bord de route, 6.1960, J. L. Ramaut 

s. n. (LG). 

Algeria: Mt Babor, sur cèdre, 9.1981, J. P. Ledant s. n. (LG). 

Spain, Canary Isles: Tenerife, route La Esperanza-Las Cañadas, La Crucita, crête 

venteuse, 1970 m, blocs de lave, 4.1972, J. R. De Sloover 72L108 (LG); Tenerife, route 

Aquamansa-El Portillo, barranco recoupé par la route, 1680 m, sur sol meuble entre les 

rochers, 3.1972, J. R. De Sloover 72L16 (LG). 

This species was recently described from Germany (FEUERER & THELL, 

2002) and has subsequently also been discovered in southern Sweden (THELL, 

2003). It is very similar to Parmelia saxatilis, but mainly differs in the strongly 

pruinose upper thallus surface (sometimes epruinose near the margin) and 

isidia. From the original description, it seems obvious that Parmelia saxatilis 

var. retiruga f. pruinosa Lynge [in Bergens Museums Aarbog 9: 91, 1910] 

represents the same taxon. There might be a sorediate counter-part in P. sulcata 

as Harmand (Lich. de France 4: 567, 1909) has described var. pruinosa Harm. 

within that species with the following description: “Thalle blanchâtre ou 

blanc-grisâtre recouvert d’une pruine farineuse …”. Indeed, the collections of 

P. sulcata in LG and hb Diederich hold several specimens which match that 

description. It seems clear to us that detailed DNA analysis of such sibbling 

taxa should provide reliable data to assess their taxonomic value. 

We report P. ernstiae here as new for the study area, where it appears to be 

widespread although much rarer than P. saxatilis, for France, Greece, Slovenia, 

Algeria and the Canary Isles. 

Peltigera extenuata (Vain.) Lojka 

Belgium, Lorr.: Buzenol, bord de la voie ferrée près de la gare (M7.14), 8.1965, J. 

Lambinon 65/671 (LG). 

Luxembourg, Lorr.: s. loc., vers 1840, F.-A. Tinant 80 (LUX); Pétange, Prënzebierg (M8.31), 

9.1966, J. Lambinon 67/1360 (LG); Mensdorf, Widdebierg, carrière (L9.51), sur un rocher 

en grès, 8.1982, P. Diederich 3606 (h); entre Dudelange et Kayl, Haard (M8.54), sur de la 

terre, 7.2002, J. Miadlikowska, P. Diederich 15486 (h) & D. Ertz 2512 (BR).

-23- 

This taxon was for a long time included in the species concept of Peltigera 

didactyla. It is distinguished from the latter by the abundant, strongly branched 

rhizinae. The young soralia of P. extenuata react C+ red and those of P. didactyla 

C- and thus provide a further diagnostic feature. New for the study area. 

The collection from Dudelange is parasitized by the lichenicolous 

ascomycete Corticifraga fuckelii (Rehm) D. Hawksw. & R. Sant. 

Peltigera monticola Vitik. 

Luxembourg, Lorr.: Lamadelaine, Fusboesch (M8.31), over soil, 7.2002, J. 

Miadlikowska 07.27.02/8, P. Diederich & D. Ertz (DUKE, hb Diederich). 

This species was described by VITIKAINEN (1994) for a small number of 

specimens from central and south-eastern Europe (Austria, Greece, Italy, 

Montenegro, Romania, Sardinia, Slovenia and Switzerland). It was later also 

recorded from Sweden (BERGSTEN, 1999) and from the Iberian Peninsula 

(MARTÍNEZ et al., 1997). It is very similar to P. rufescens and P. ponojensis, 

and VITIKAINEN (1994) noted that it is in need of further observations. Peltigera 

monticola belongs to the canina-aggr. and thus has a tomentose upper surface, 

at least on marginal lobes. It can be distinguished by its upper surface indeed 

hardly tomentose, but also slightly and distinctly pruinose at lobes margins, by 

the development of lobules, and by short, simple, slender, brownish rhizines. It is 

close to P. ponojensis, another poorly understood species in the area of study. 

Two typical specimens of this species were collected, together with 

abundant P. rufescens, P. didactyla, and more rarely P. ponojensis, near 

Lamadelaine, in a terricolous vegetation dominated by Peltigera species. 

ITS-sequences of both specimens, and also of several P. ponojensis specimens 

from the same locality confirmed the identifications (J. Miadlikowska, pers. 

comm.). The species is new for the study area. 

*Phacopsis fusca (Triebel & Rambold) Diederich 

Syn.: Phacopsis oxyspora (Tul.) Triebel & Rambold var. fusca Triebel & Rambold 

Belgium, Ard.: Salmchâteau (H8.31), on Neofuscelia pulla, 6.1890, J. Feltgen 171a 

(LUX); Houffalize, rochers gréseux au bord de la route de La Roche, à 2 km de Houffalize 

(J7.27), sur Xanthoparmelia conspersa, 11.1961, J. Lambinon 61/2408 (LG). 

Luxembourg, Ard.: Hoscheid, Molberlay (K8.24), on Xanthoparmelia somloensis, 

4.2000, P. Diederich 14127 (h). 

The specimen from Houffalize was published by SÉRUSIAUX et al. (1999: 

64) as Phacopsis oxyspora. Re-examination of the material and the discovery 

of two additional specimens lead to P. fusca, a taxon mainly growing on 

Xanthoparmelia species (TRIEBEL et al., 1995). P. oxyspora s. str. does not seem 

to occur in the study area and has to be deleted from the checklist.

-24- 

Phaeographis dendritica (Ach.) Müll. Arg. 


alt. 75 m, sur Carpinus dans une forêt, 7.2001, P. Diederich 15087 (h). 

Within the study area, this extremely rare species was known only from one 

19 th century record from B Brab. (DIEDERICH & SÉRUSIAUX, 2000: 139), and it 

was considered to be extinct. It was discovered in the forêt domaniale de Crécy 

together with P. inusta on Carpinus, P. smithii on Quercus and Leiorreuma 

lyellii (syn.: P. lyellii) on Carpinus, demonstrating the very high patrimonial 

value of this remarkable forest. 

Phaeographis smithii (Leight.) B. de Lesd. 


alt. 75 m, sur Quercus dans une forêt, 7.2001, P. Diederich 15094 (h). 

This species was known from one 19 th century record from B Fl., one 

1910 record from F Brab. (DIEDERICH & SÉRUSIAUX, 2000: 139), and two 

1954 records from F Boul. (SPARRIUS et al., 2002), and it was considered to be 

extinct in our study area. 

Physcia leptalea (Ach.) DC., nom. cons. 

Syn.: P. semipinnata (J. F. Gmel.) Moberg 

Luxembourg, Lorr.: NE of Differdange, near Rodange, reserve Prënzebierg (M8.31), 

on Salix, abandoned old quarry with Betula and Salix trees, 10.2002, P. & B. van den 

Boom 29822 (h, hb Diederich). 

France, Mar.: Pas-de-Calais, au N de Dannes, dunes, un peu au N du parking permettant 

l’accès au Mont St-Frieux (F22.35), sur Salix en bord de chemin dans une petite mare, 

7.2002, P. Diederich 15439 (h); Somme, à 6 km au NNW de Le Crotoy, à 1 km au SW 

du Bout des Crocs, près de l’entrée du parc ornithologique du Marquenterre (H22.34), sur 

Fraxinus, dans une dune plantée principalement de pins, 7.2001, P. Diederich 15330 (LG, 

h). – Pic.: Pas-de-Calais, à 5 km au SSE de Montreuil, route d’Ecuires vers Bloville, à 500 m 

avant Bloville (G22.38), sur Acer, le long d’une route, 7.2002, P. Diederich 15452 (h). 

In the 19 th century this species was relatively common in Luxembourg, 

where Feltgen collected it many times in the surroundings of Mersch; it was 

last collected there in 1891. In Belgium, it was known from one 1962 record 

from the Mar. district, one 1851 record from the Brab. district, and two Ard. 

records before 1856. It was considered to be extinct in the study area since 

1962 (DIEDERICH & SÉRUSIAUX, 2000: 141). It was furthermore reported from 

three collections from the Mar. and Boul. districts in France (Pas-de-Calais), 

the most recent record being from 1973 (SPARRIUS et al., 2002). The unexpected 

recent discovery of a healthy population in L Lorr and the finding of several 

populations in F Mar. and Pic. suggest that either the species was overlooked 

until recently, or that it is currently spreading in our region.

Placynthiella dasaea (Stirt.) Tønsberg 

-25- 

Belgium, Camp.: Kalmthoutse Heide, dune area with Calluna heathland and scattered 

trees (B4.27), 3.2000, P. & B. van den Boom 23986 (h); E of Leopoldsburg, S of Hechtel, 

Hechtelse Heide (C6.57), Calluna heathland with scattered trees, vertical facing sand 

along path, 3.2001, P. & B. van den Boom s. n. (h); NNW of Hamont, Beverbeekse 

Heide (B7.52), small Calluna heathland, 6.2000, P. & B. van den Boom 24282 (h); E of 

Genk, SW of Maasmechelen Kikmolen (D7.44), mixed forest, on Quercus, 4.2001, P. 

& B. van den Boom s. n. (h); ENE of Zonhoven, nature reserve ‘De Teut’ (D6.38), on 

the wood of a dead tree in a heathland, 9.2001, P. Diederich 15031 (h). – Lorr.: 10 km 

WSW of Arlon, large quarry on S side of road from Meix-le-Tige to Chantemelle, at c. 

2.5 km ESE of Chantemelle (M7.15), on plant debris, 9.2002, P. Diederich 15554 (h). 

France, Pic.: Somme, Doullens, vallée de l’Authie en aval de Doullens (J0.11), sur 

Populus, le long d’un ruisseau, 3.1989, E. Sérusiaux 10387 (LG). 

DIEDERICH & SÉRUSIAUX (2000: 144) reported this species from Luxemburg 

and suggested that it might be overlooked in Belgium. During recent excursions 

in Belgium and the southern Netherlands, it appeared to be widespread. New 

for Belgium. 

*Polydesmia lichenis Huhtinen & R. Sant. 

Luxembourg, Lorr.: E of Tétange, Langertengrond (M8.54), on the lower thallus 

surface of Peltigera, 4.1987, G. Marson s. n. (hb Diederich 8710); Pétange, Prënzebierg 

(M8.31), anciens déblais de minerai de fer, sur P. rufescens, 5.2003, P. Diederich 15617 

(h). 

This lichenicolous ascomycete was described from Norway and Sweden 

on Peltigera species (HUHTINEN & SANTESSON, 1997) and was eventually also 

recorded from Austria (HAFELLNER, 1998). Our material is poorly developed, 

and the perithecia are immature. Nevertheless, the most characteristic ascomata 

were compared macroscopically and microscopically with an isotype specimen 

(in hb Diederich), and perfectly match this species. New for the study area. 

*Pronectria oligospora Lowen & Rogerson var. octospora Etayo 

Belgium, Camp.: 8 km S of Geel, Zammel, Zammelsbroek (C5.58), on Punctelia 

subrudecta, 1.2002, O. Heylen (h, hb Diederich). 

Lichenicolous ascomycete new for the study area. 

*Pronectria pertusariicola Lowen 

Belgium, Lorr.: 6 km SE of Florenville, 4 km S of Pin, along road to Abbaye 

d’Orval, small valley W of road, just S of Etang du Pré Frère Simon (L6.57), on Acer 

pseudoplatanus, on Pertusaria pertusa, 9.2002, P. Diederich 15527 (h). 

Madeira: road between Ribeira Brava and S. Vicente, 2 km N of Encumeada, 800 m, on 

Pertusaria, 4.1992, P. Diederich 4885 (h).

-26- 

This lichenicolous ascomycete was known from the Canary Islands, France, 

Great Britain, Ireland, Spain and Sweden (COPPINS & COPPINS, 2000; ETAYO, 

1996; FOX, 2000; ROSSMAN et al., 1999), and is here newly reported from 

Belgium and from Madeira. The original account of the species is somewhat 

confusing, as the ascospores were said to be (9-)15-20 × 4.5-5(-6) μm in the 

description (p. 59), but only 9-12 × 4.5-5 μm in the key (p. 62) (ROSSMAN et al., 

1999). The ascospores in the Belgian specimen are 12-14 × 5.5-6.5 μm. 

Protopannaria pezizoides (Weber) P. M. Jørg. & S. Ekman 

Syn.: Pannaria pezizoides (Weber) Trevis. 

Belgium, Mosan: N of Villers-sur-Lesse, near Château Royal (J6.13), mossy slope in 

ditch, 5.2001, P. & B. van den Boom 26501 (h, LG). 

The latest report of this species in the area of study dates back to 1947 from 

the Berdorf area in L Lorr. (SÉRUSIAUX, 1984: 85). It was believed to be extinct 

and its recent discovery in a ditch by a road indicates it may still be present in 

other localities. 

Protoparmelia hypotremella van Herk, Spier & Wirth 

Belgium, Ard.: Nassogne, SW side of Bosteubois (J6.27), edge of mixed forest, on 

Quercus, 4.2001, P. & B. van den Boom 26462 (h, LG). 

This sterile corticolous species was formerly known from a single locality 

in the area of study (Mosan district) (DIEDERICH & SÉRUSIAUX, 2000: 149) and 

is obviously overlooked. 

Punctelia borreri (Sm.) Krog 

Belgium, Mar.: De Panne, Westhoek, sentier le long de la frontière française (C0.56), 

sur Crataegus, 6.2001, P. Diederich 14669 (h); De Haan, nature reserve ‘Zandpanne’ 

(B1.57), on Salix alba near wet dune vegetation, 1.2002, O. Heylen HW/02/35 (h). 

– Camp.: Hulsen (Balen), river valley Grote Nete (C6.43), in wet Salix forest, 11.2001, 

O. Heylen HW/L01/556 (h); Hulshout, river valley Grote Nete (D5.15), on Populus 

×canadensis, 10.1999, O. Heylen HW/L99/550 (h); Schilde, on a tree along av. 

Molenstraat near the centre of Schilde (C5.11), on cf. Robinia, 2.2002, H. Stappaerts 

(hb Heylen HW/L02/65). – Mosan: Erquelinnes (H4.21), on Malus, s. d. [before 1937], 

A. Gravis s. n. (LG); Charneux (commune de Harsin), bord de la route Marche-Arlon 

(J6.17), tronc de Fraxinus, 9.1962, J. Lambinon 62/1507 (LG); Rochefort, SE of village, 

near entrance of caves (J6.25), on Tilia along parking-lot, 4.2001, P. & B. van den Boom 

26391(h); Macon, le long de la route vers Chimay (J4.53), sur Ulmus ×hollandica, 

8.1962, J. Duvigneaud 62/523 (LG, with Normandina pulchella). – Lorr.: Torgny, on 

Populus in plantation along river Chiers (M7.42), 7.1997, L. B. Sparrius 236 (h). 

Luxembourg, Lorr.: Remerschen, gravières (M9.52), sur Salix, 5.1998, P. Diederich 13600 

(h); Lorentzweiler, Roude Bam (L8.46), sur Juglans, dans un verger, 10.2000, P. Diederich 

14417 (h); Lasauvage (M7.48), on wayside Acer, 9.1999, L. B. Sparrius 3380 (h).

-27- 

France, Pic.: Somme, vallée de l’Authie, ancienne abbaye de Valloires, jardin de Valloires 

(G22.58), sur Acer dans un arboretum, 7.2001, obs. P. Diederich (no specimen). 

Species of the Parmelia subrudecta aggregate in Western Europe have 

recently been studied in great detail (VAN HERK & APTROOT, 2000). Three 

species are present in the area of study, viz. the widespread and common P. 

subrudecta (Nyl.) Krog and P. ulophylla (Ach.) van Herk & Aptroot, and the 

much rarer P. borreri (Sm.) Krog. The specimens mentioned above represent 

the total of specimens that clearly belong to the latter. It is interesting to note 

that all three species are represented in the Belgian material studied by TARGÉ 

& LAMBINON (1965) and mentioned under Parmelia borreri (Sm.) Turner 

chemovar. pseudoborreri (Asahina) Lambinon & Targé. 

Ramonia interjecta Coppins 

Belgium, Mosan: Lustin (G5.57), W slope along small road, on Sambucus, 4.2001, P. & 

B. van den Boom 26412 (h, LG). 

The Netherlands: Noord-Brabant, Budel, Grote Heide, on Sambucus, 9.2001, P. van 

den Boom 27958 (h) & M. Brand. 

Species of the genus Ramonia have never been reported from the study 

area. Their apothecia are immersed in the bark and thus easily overlooked. 

Rhizocarpon plicatile (Leight.) A. L. Sm. 

This species was mentioned from a single collection from B Ard. (SÉRUSIAUX 

et al., 1999: 74) but this epithet applies to a crustose species of Stereocaulon 

(FRYDAY & COPPINS, 1996). Re-examination of the specimen (Chiny, 5.1986, 

E. Sérusiaux 7873, LG) following the key by FRYDAY (1996) shows that it 

actually belongs to the norstictic acid containing strain of R. reductum Th. Fr., 

a species already known in the study area (DIEDERICH & SÉRUSIAUX, 2000: 154). 

Rhizocarpon plicatile should thus be removed from the checklist. 

Rimularia insularis (Nyl.) Rambold & Hertel 

France, Mosan: Ardennes, Rancennes, rochers d’Aviette (J5.35), rochers schisteux ± 

calcareux et ensoleillés, 4.1982, P. Malaise & E. Sérusiaux 2737 (LG). 

This collection has been waiting for a long time to be named. Indeed, the 

description provided by The Lichen Flora of Great Britain and Ireland (PURVIS 

et al., 1992: 330) is misleading as it indicates that this species is lichenicolous 

on Lecanora rupicola and has a thallus which is C-. Our specimen is clearly an 

autonomous lichen and reacts C+ red due to the production of gyrophoric acid. 

B. J. Coppins (pers. comm.) has confirmed its identity. Rimularia insularis is 

new for the area of study. The species was recently reported from the Eifel in 

Germany (WIRTH & HEIBEL, 1998).

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*Roselliniella atlantica Matzer & Hafellner 

Luxembourg, Ard.: Bourscheid, along road to Ettelbruck, near Michelau (K8.45), W 

exposed schistose outcrops along road, on Neofuscelia pulla, 10.2002, P. & B. van den 

Boom 29887 (h). 

This species was described from the British Isles, France and Sweden on 

Neofuscelia and Xanthoparmelia species (Matzer & Hafellner, 1990). It has 

also been reported from Papua New Guinea on Hypotrachyna and Parmotrema 

(Aptroot et al., 1997), from the Canary Islands on Platismatia (Etayo, 1996), 

from Spain on Neofuscelia (Calatayud et al., 1995), and from N America 

(Florida) on Parmotrema (Etayo & Breuss, 1998). It is new for the study area. 

Sarcosagium campestre (Fr.) Poetsch & Schied. var. macrosporum Coppins 

& P. James 

Belgique, Mosan: Vedrin (au N de Namur), cimetière de Vedrin (G5.26), sur des 

mousses dans un pot de fleur ensoleillé dans un cimetière, 11.2002, D. Ertz 2731 (BR); 

Plombières, parc de l’ancien site minier, on soil in Armeria-heathland (E8.52), 4.2001, 

L. B. Sparrius 4680 (h). 

This taxon was formerly known from a single locality in L Lorr. (DIEDERICH & 

SÉRUSIAUX, 2000: 158) and from the British Isles, and is thus new for Belgium. 

*Sphaerellothecium cladoniicola E. S. Hansen & Alstrup 

Luxembourg, Lorr.: NE of Differdange, near Rodange, reserve Prënzebierg (M8.31), 

abandoned old quarry with Betula and Salix trees, on Cladonia fimbriata, 10.2002, P. & 

B. van den Boom 29846 (hb Diederich). 

In the study area, this species was known only from a single 1888 specimen 

from B Brab. (SÉRUSIAUX et al., 1999). The additional specimen reported here 

is quite reduced, but shows that the species still exists in this area, and that it is 

most likely to be overlooked. 

Sticta fuliginosa (Dicks.) Ach. 

Belgium, Ard.: near Herbeumont (L6.26), on Acer, 3.2003, D. Ertz 3052 (BR). 

This macrolichen was known from a single recent locality in the Lorr. district 

and was considered to have disappeared from the Ard. district since 1928. 

We recently revisited the Lorr. locality and found a relatively healthy 

population of over 40 thalli on four trees. In the Ard. locality, more than 

100 thalli grow on a single Acer tree of 45 cm in diam. In both localities, 

the species grows in well-preserved old forests with important populations 

of Lobaria pulmonaria. These trees are mainly Acer pseudoplatanus and A. 

platanoides, and more rarely Quercus sp.; only one thallus of L. pulmonaria 

was observed on Fagus sylvatica.

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As it has been already stated for Lobarina scrobiculata (see above), a 

special conservation program is urgently needed for epiphytic species of the 

Lobarion complex in S Belgium and more generally for species requiring oldgrowth 

forests. 

*Stigmidium aggregatum (Mudd) D. Hawksw. 

Syn.: Stigmidium eucline (Nyl.) Vĕzda; Mycoporum eucline Nyl.; ?Pharcidia 

microspila var. pertusariae B. de Lesd. 

Luxembourg, Ard.: Heinerscheid, Kasselslay (J8.45), sur un rocher en schistes, sur 

Pertusaria lactea, 11.1983, P. Diederich 5035B (h). 

France: Pyrénées-Orientales, flanc E du Canigou, forêt de Valmanya, chemin vers 

Pinateil, 1450 m, sur P. lactea, 7.1990, E. Sérusiaux 10923 (LG, hb Diederich). 

Germany: Baden-Württemberg, Südschwarzwald, Simonswald, Dürrstein am Ibichkopf 

(MTB 7814/4), 1050-1070 m, on P. lactea, 5.1997, V. Wirth 30170 (STU-Wirth). 

Hungary: ad saxa granitica circa Thermas Herculis in Banatu, on P. lactea, 1874, H. 

Lojka (NY ex hb Leighton – isotype of Mycoporum eucline !). 

Slovakia: Carpati, Tatra Magna, in alpe Hlúpý, 1950 m, on P. lactea, 6.1964, A. Vĕzda 

(MSC 77252). 

Spain: Navarra, W Pamplona, Sierra de Urbasa, Pto de Urbasa, on Fagus, on P. pertusa, 

7.1991, P. Diederich 9650 (h); Cuenca, Talayuelas, Pico Ranera (UTM 30SXK4408), 

1400 m, on P. pertusa, 7.1992, V. Calatayud (VAB-Lich, hb Diederich). 

Switzerland: Kanton Luzern, Oberwalden, Alpnach, Mittagsgüpfi, Grat SW des Gipfels, 

1825-1860 m, auf P. lactea, 9.1997, V. Wirth 30766 (STU-Wirth). 

Stigmidium aggregatum was originally described from Aspicilia calcarea in 

Great Britain. However, HAWKSWORTH (1983) states that the species grows on 

Pertusaria lactea, without indicating if he had examined the type collection, and 

SANTESSON (1993) followed this option. We examined a type specimen of Mycoporum 

eucline, originally described from Hungary on Pertusaria velata, and found that the 

host is also P. lactea. Both taxa are obviously synonyms. A further taxon, Pharcidia 

microspila var. pertusariae, was described from S France on Pertusaria pertusa, but 

the type is most probably lost. As we have seen two typical Spanish specimens of S. 

aggregatum growing on P. pertusa (incl. P. rupestris), this supports the idea that P. m. 

var. pertusariae is a further synonym of S. aggregatum. 

The species does not belong to Stigmidium, as the hamathecium is 

composed of 1.5-2.5 µm thick, anastomosed, septate pseudoparaphyses, and 

the ascospores become brownish when overmature (observed in the isotype 

collection of Mycoporum eucline). The ascospores are 1-septate, smooth, 

hyaline except when old, without a distinct perispore, 11.5-18 × 5-5.5 µm. The 

centrum is KI-, but the epiplasm turns deep orange in KI. The asci are elongate, 

thick-walled, with a distinct ocular chamber. Further studies are needed to 

determine the accurate systematic position of this fungus.

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Stigmidium aggregatum was known from Austria, Great Britain, Hungary, 

Italy, Norway, Slovakia and Sweden (HAWKSWORTH, 1983; SANTESSON, 1993; 

TRETIACH & HAFELLNER, 2000; WITTMANN & TÜRK, 1994), and is here newly 

reported from France, Germany, Luxembourg, Spain and Switzerland. 

*Stigmidium mycobilimbiae Cl. Roux, Triebel & Etayo 

Luxembourg, Lorr.: NE of Differdange, Tëtelbierg, near Rodange, reserve Prënzebierg 

(M8.31), on Myxobilimbia sabuletorum, 10.2002, P. & B. van den Boom 29818 (h); 

SSW Bascharage, près du Moulin de Bascharage (M8.31), sur un mur en grès, sur 

M. sabuletorum, 8.1987, P. Diederich 8331 (h); W of Kayl, Monument des mineurs 

(M8.53), on M. sabuletorum, 10.2002, P. & B. van den Boom 29882 (h). 

Netherlands: Limburg, Bemelen, ‘t Rooth, voormalige mergelgroeve met geëxponeerde 

en beschaduwde blokken tufkrijt (km.blok 62-21-43, 182/316), on M. sabuletorum, 

5.1998, P. Diederich 13684 (h). 

A minuscule, and probably overlooked lichenicolous ascomycete, 

apparently confined to the genus Myxobilimbia. New for the study area. 

*Stigmidium peltideae (Vain.) R. Sant. 

Luxembourg, Lorr.: Pétange, Prënzebierg (M8.31), abandoned old quarry with Betula 

and Salix trees, on Peltigera hymenina, 10.2002, P. & B. van den Boom 29843 (h); ibid., 

on P. neckeri, 5.2003, P. Diederich 15619 (h). 

This species was reported from L Ard. by DIEDERICH et al. (1991), but 

SÉRUSIAUX et al. (1999) showed that the corresponding specimen belongs 

to Stigmidium pseudopeltideae Cl. Roux & Triebel. That latter name was 

published as a nomen nudum by ROUX & TRIEBEL (1994), and has recently 

been validated (DIEDERICH, 2003). 

In our recent collections, the perithecia are very small (30-40 μm in 

Diederich 15619, 30-60 μm in van den Boom 29843, compared to 50-70 μm 

in ROUX & TRIEBEL, 1994), and the ascospores are also smaller (7-10 × 2.5-3 

μm; compared to (8.5-)9-11.5(-12) × (2.5-)3-3.5(-4.5) μm in ROUX & TRIEBEL, 

1994). Nevertheless we consider that they belong to Stigmidium peltideae, 

and that the variability of this species is larger than given by ROUX & TRIEBEL 

(1994). S. peltideae is reported here as new for the study area. 

*Taeniolella beschiana Diederich 

Belgium, Camp.: ENE of Zonhoven, nature reserve ‘De Teut’ (D6.38), terricolous in 

heathland, on basal squamules of Cladonia chlorophaea, 11.2001, P. Diederich 15020 (h). 

This lichenicolous hyphomycete, originally described from Luxembourg 

(DIEDERICH, 1992), is here newly recorded for Belgium.

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*Tremella caloplacae (Zahlbr.) Diederich comb. nov. 

Bas.: Lindauopsis caloplacae Zahlbr., Ber. Deutsch. Bot. Ges. 24: 145 (1906). 

Type: Crete, ‘an Kalkfelsen bei Kristallenia’, 1904, R. Sturany (W 11196, lichenicolous 

fungus in apothecia of Caloplaca: lectotype, here designated). 

France: Vaucluse, à 2 km au S de Gordes, col de Gordes, sur un mur, sur Caloplaca, 

4.1995, P. Diederich 12328 (h). 

Spain: Castilla-La Mancha, prov. Toledo, cerca de Los Yébenes, on C. carphinea, 

7.2000, V. Calatayud 111 (h, hb Diederich). 

In his revision of lichenicolous heterobasidiomycetes, DIEDERICH (1996) 

described and illustrated a species growing in the hymenium of Caloplaca 

in Austria and Great Britain, but left it provisionally unnamed (as ‘Tremella 

sp. 1’), as almost no differences could be detected with Tremella rinodinae, 

an intrahymenial parasite of Rinodina gennarii. In the mean time, the species 

has twice been mentioned from our study area (NAVARRO-ROSINÉS & HLADUN, 

1996; SPARRIUS et al., 2002) in F Mar. We have seen additional specimens from 

France and Spain (see above mentioned collections). 

We found an old name for this species, Lindauopsis caloplacae Zahlbr., 

described from Crete, and we take the opportunity here to combine it in 

Tremella. The new genus and species were described by ZAHLBRUCKNER 

(1906) as a hyphomycete with large, 1-septate conidia. However, the ‘conidia’ 

depicted by ZAHLBRUCKNER (1906) in figs 3-4 are nothing else than tremelloid 

basidia with one transverse septum. The subspherical cells attached to 

the hyphae of the fungus, as depicted in ZAHLBRUCKNER (1906: fig. 2) are 

tremelloid haustoria, on which the haustorial filament is not represented. The 

detailed description and drawings provided by ZAHLBRUCKNER (1906) and reexamination 

of the type specimen leave no doubt that Lindauopsis caloplacae 

represents ‘Tremella sp. 1’ (sensu DIEDERICH, 1996). 

Lindauopsis caloplacae was studied in great detail by RIEDL (1976). 

The author concluded that it does not represent a lichenicolous fungus, “but 

structures of a hymenial layer degenerated through the competition with an 

over-growing thallus of a different lichen species. Paraphyses tend to form 

spore-like ends, while asci are much narrowed and produce only 1 or 2 spores, 

becoming paraphysis-like in the parts not containing spores”. This erroneous 

conclusion is not astonishing if we consider that the whole of the lichenicolous 

heterobasidiomycetes were wrongly interpreted by lichenologists over 

more than 250 years, as exemplified by Biatoropsis usnearum (DIEDERICH & 

CHRISTIANSEN, 1994). HAWKSWORTH (1979) claims that his “examination of the 

lectotype specimen confirms Riedl’s interpretation of this name”. 

The typification of the name L. caloplacae is more problematic. We received 

two specimens on loan from W, both designated as types of this species. One 

annotated “Lindauopsis Caloplacae A. Zahlbr. Parasitisch im Hymenium der

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Caloplaca (Gasparrinia) callopisma Th. Fr. Kreta: an Kalkfelsen bei Kristallenia, 

1904, leg. R. Sturany, spec. orig.!; Acqu. 1906 N° 11196” obviously represents 

the type specimen studied by Zahlbruckner, as the apothecia are heavily attacked 

by the Tremella. A second specimen is annotated “Caloplaca (Gasparrinia) 

callopisma Th. Fr., Kristallenia in der Hochebene Lasithiotika, Ost Kreta, Kalk, 

Juni 1904, leg. Sturany; 729”; the Caloplaca apothecia appear to be healthy 

and are not visibly parasitized. ZAHLBRUCKNER (1906) wrote that Dr R. Sturany 

collected Lindauopsis caloplacae ‘auf Kalkfelsen bei Kristallenia in Ostkreta’ 

on Caloplaca callopisma, and that the apothecia were ‘stark deformiert’, which 

perfectly fits specimen 11196. RIEDL (1976) regretted that the type specimen was 

not annotated with the name of the fungus, nor integrated in the fungal herbarium 

in W, but instead was found under the name Caloplaca callopisma within the 

lichen herbarium. This strongly suggests that Riedl did not see the genuine type 

specimen, but instead another specimen of the host species collected by Sturany 

in Crete, that appeared to be infected by the Tremella as well. HAWKSWORTH 

(1979) cited the type specimen as ‘Crete, Paßhöhe Bebona bei Kavusi, in 

apothecia of Caloplaca aurantia, on limestone, 21 May 1904, R. Sturany (W 

1906/755–lectotype!)’. This certainly does not represent any type material, as 

the locality is different from that published by ZAHLBRUCKNER (1906). It is not 

clear if HAWKSWORTH (1979) lectotypified the name on this specimen, or if he 

referred to an earlier lectotypification (possibly indicated on the label of the 

specimen). In any case, we have to follow the ICBN (art. 9.17) that requires that 

an earlier lectotypification is superseded (a) if the holotype is rediscovered, or 

(b) if one can show that it is in serious conflict with the protologue and another 

element is available that is not in conflict with the protologue, or (c) if the type 

specimen contains more than one species and the name was lectotypified on 

a part that does not correspond most nearly with the original description. As 

the three conditions of art. 9.17 are satisfied, we here re-lectotypify the name 

Lindauopsis caloplacae on the lichenicolous fungus present in the hymenium of 

Caloplaca in specimen 11196 (W). 

Tremella caloplacae is so far known from Algeria (ZAHLBRUCKNER, 1906), 

Austria, Crete, France, Great Britain and Spain on several Caloplaca species, 

including C. arenaria, C. arnoldii, C. aurantia, C. carphinea and C. saxicola. 

It is most probably much overlooked, as no visible basidiomata are present, but 

instead just swollen host apothecia that tend to become darker. 

*Tremella candelariellae Diederich & Etayo 

Belgium, Brab.: Geraardsbergen, Chappel Oudenberg (E3.45), on the wall of a church 

(calcareous stones, mortar, etc.), on Candelariella vitellina, 8.1999, P. Diederich 13915 

(h) & M. Hoffmann. 

Luxembourg, Lorr.: Lorentzweiler, Roude Bam (L8.46), sur un toit en eternit, sur 

C. aurella, 6.1997, P. Diederich 12808 (h); SE of Lasauvage, Grand-Bois (M7.48),

-33- 

on roadside Acer, on C. xanthostigma, 9.1996, P. Diederich 12435 (h); ibid., on C. 

vitellina, 9.1996, P. Diederich 12436 (h). 

This lichenicolous basidiomycete was known from Luxembourg and 

Spain, on Candelariella vitellina and C. xanthostigma (DIEDERICH, 1996). 

We here report it as new for Belgium, and also on a new host, C. aurella. 

In specimens P. Diederich 12808 and 12435, we were able to demonstrate 

the presence of asteroconidia, previously not known from this species. 

Interestingly, in Lasauvage, the species was present on Candelariella vitellina 

and C. xanthostigma, but absent on C. reflexa. 

*Trichonectria anisospora (Lowen) van den Boom & Diederich comb nov. 

Bas.: Nectriella anisospora Lowen, Mem. New York Bot. Garden 49: 248 (1989); 

Pronectria anisospora (Lowen) Lowen, Mycotaxon 39: 461 (1990). 

Belgium, Ard.: SE of Eupen, Hertogenwald, N side along road to Monschau, nature 

reserve, path from Brackvenn to Nahtsief (F8.56), on Hypogymnia physodes, 9.2001, 

B. & P. van den Boom 27965 (h, hb Diederich). 

The genus Pronectria (syn. Nectriella) includes 27 lichenicolous species 

(LAWREY & DIEDERICH, 2003), all with more or less immersed perithecia. 

One of them, Pronectria anisospora is distinguished from all other species 

of the genus by setose perithecia (LOWEN, 1989). Our recent discovery of a 

fully mature population in Belgium allowed us to recognize that perithecia 

are initially entirely immersed and non-setose, become erumpent, with the 

development of setae on the exposed parts around the ostiole, and finally 

become superficial. The setae are hyaline, aseptate, smooth, straight, solitary 

and thick-walled (LOWEN, 1989). The mature, superficial perithecia fully agree 

with the current circumscription of the genus Trichonectria (see ROSSMAN et al., 

1999), and the new combination in that genus is here proposed. Trichonectria 

anisospora appears to be confined to a single host species, Hypogymnia 

physodes. It is so far known from Austria (HAFELLNER, 1996), Belgium, the 

British Isles (HAWKSWORTH, 1990; hb Diederich), France, Spain (ETAYO, 1998) 

and the USA (LOWEN, 1989). It is new for the study area. 

Trichonectria anisospora is the seventh known lichenicolous species of 

the genus, the other being T. hirta (Bloxam) Petch (generic type) (ROSSMAN 

et al., 1999), T. rubefaciens (Ellis & Everh.) Diederich & Schroers (SÉRUSIAUX 

et al., 1999), T. leptogiicola Etayo (ETAYO, 2001), T. hypotrachynae Etayo, T. 

setadpressa Etayo and T. usneicola Etayo (ETAYO, 2002). In a recent paper 

on American lichenicolous fungi, COLE & HAWKSWORTH (2001) combined T. 

rubefaciens (as ‘rubifaciens’) in Nectriopsis, on the basis of the absence of thickwalled 

setae in the specimen examined by them. The authors didn’t say if they 

observed thin-walled setae, or if setae were absent. Examination of the holotype 

of T. rubefaciens (in NY) by Dr G. Samuels (pers. comm.), and comparison

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with Luxembourg material of the same species (P. Diederich 8910), proved that 

ascomatal setae in this species are definitely thick-walled (Fig. 1). This suggests 

that the specimen examined by COLE & HAWKSWORTH (2001) is in a poor 

condition, or belongs to a different species. We are aware that the generic limits 

between Trichonectria and Nectriopsis are far from being clear, and also that 

the ascospores and anamorph of most Trichonectria species are different from 

those of the type species, T. hirta, but for the moment, we believe that it is best to 

include both T. anisospora and T. rubefaciens within the genus Trichonectria. 

*Unguiculariopsis thallophila (P. Karst.) W. Y. Zhuang 

Luxembourg, Ard.: S of Beiler (J8.15), on Lecanora chlarotera, on Populus, 8.1986, P. 

Diederich 7297 (h). 

France, Pic.: Pas-de-Calais, à 5 km au SSE de Montreuil, route d’Ecuires vers Bloville, 

à 500 m avant Bloville (G22.38), sur Acer, le long d’une route, sur L. chlarotera, 

7.2002, P. Diederich 15453 (h). 

Lichenicolous ascomycete new for the study area. 

Verrucaria elaeina Borrer 

Belgium, Mosan: Dinant, Fonds de Leffe (H5.38), shaded calcareous rock in forest, 2 & 

4.1999, D. Ertz 26 & 54 (LG); Dinant, Devant-Bouvignes (H5.37), shaded calcareous 

rock in forest, 3.1999, D. Ertz 37 (LG); Anseremme, rochers de Moniat (H5.47), shaded 

calcareous outcrop in forest, 4.1999, D. Ertz 528 (LG); Plainevaux, roche aux Faucons 

(F7.52), shaded calcareous rock at the top of an outcrop, 10.2001, D. Ertz 390 (LG); 

Embourg, rochers du Bout du Monde (F7.53), shaded and damp calcareous outcrop in 

forest, 11.2001, D. Ertz 399 (LG); Comblain-au-Pont, Les Tartines (G7.23), base of a 

calcareous outcrop in forest, 11.2001, D. Ertz 356 (LG); Yvoir, rocher de Champalle 

(H5.27), calcareous rock in forest, 12.2001, D. Ertz 417 (LG); Huy, entrée du vallon de 

Solières (G6.14), shaded calcareous rock in forest, 3.2002, D. Ertz s.n. (LG). 

Luxembourg, Lorr.: au S de Schengen, dans la forêt ‘Fiels’ (N9.12), 280 m, sur une paroi 

verticale ombragée en calcaire coquillier, dans une forêt, 8.1998, P. Diederich 13721 (h). 

FIG. 1. — Ascomatal setae of Trichonectria rubefaciens. A, holotype (NY); B, P. 

Diederich 8910 (h) (del. G. Samuels). Scale bar = 10 μm.

-35- 

This species has recently been recognized as distinct from the closely 

related, but aquatic Verrucaria praetermissa (Trevis.) Anzi (ORANGE, 2000), 

and the records of the latter on shaded outcrops (DIEDERICH & SÉRUSIAUX, 2000) 

refer to it. It is new for the area of study. 

Verrucaria hegetschweileri Körb. 

Belgium, Ard.: Gedinne, centre village (K5.18), on exposed roots at the base of Acer 

pseudoplatanus, 5.2000, P. van den Boom 24350 (h, LG). 

This rare corticolous species of Verrucaria was known only from Switzerland 

and Czech Republic (BREUSS, 1998). It is new for the area of study. 

Verrucaria papillosa Ach. 

France, Pic.: Somme, à 6 km au NW d’Abbeville, Port-le-Grand, grande ferme fortifiée 

au centre du village (J22.17), sur un mur, 7.2001, P. Diederich 15388 (h). 

New for the study area. 

Verrucaria sorbinea Breuss 

Belgium, Mosan: SE of Rochefort, near entrance of caves (J6.15), on Tilia in parkinglot, 

4.2001, P. & B. van den Boom 26421 (h, LG). 

This species was so far known only from two collections, incl. the type 

originating from Luxembourg (BREUSS, 1998). It is thus the third report of this 

most probably overlooked species. 

Vezdaea acicularis Coppins 

Belgium, Camp.: E of Leopoldsburg, S of Hechtel, Hechtelse Heide (C6.57), Calluna 

heathland with scattered trees, vertical facing sand along path, 3.2001, P. & B. van den 

Boom 262871(h) (fertile). 

This species is widespread in the southern Netherlands, and has just been 

found in the Camp. district in N Belgium. It was growing close to V. retigera 

in a locality where an extensive population of Cladonia zopfii exists. The 

species was formerly known from a single locality in N France in the Ard. 

district (DIEDERICH et al., 1991: 43). It might be more common than previously 

expected, particularly in N Belgium. 

*Vouauxiella verrucosa (Vouaux) Petr. & Syd. 

This species has recently been published as new for Belgium (SÉRUSIAUX et 

al., 1999: 86). This has to be corrected: the corresponding specimens represent 

V. lichenicola (Linds.) Petr. & Syd. with verruculose conidia. Vouauxiella 

verrucosa has therefore to be deleted from the Checklist (DIEDERICH & 

SÉRUSIAUX, 2000: 176).

Xanthoria 

-36- 

The entire material of sorediate Xanthoria specimens from LG and the 

private collections of P. Diederich and P. van den Boom was examined. Three 

species could be recognized: 

X. candelaria is the most common and widespread species and is abundant 

on the bark of various trees throughout the entire study area, and occurs more 

rarely on walls, where the thalli are often typically coralloid (Fig. 2). 

X. fallax occurs mainly in the Ard. district, more rarely in the Mosan 

district and, with the exception of one very old specimen from Luxembourg, is 

exclusively saxicolous on siliceous rocks and walls (Fig. 3). 

X. ulophyllodes also has a more restricted distribution, as it is known from 

the Ard. and Lorr. districts, always on the bark of trees; most specimens of 

X. ulophyllodes were hidden in the herbaria under X. candelaria. The recent 

report of X. fallax from the Boul. district in France (SPARRIUS et al., 2002) is 

wrong; the specimen has been re-examined by L. Sparrius (pers. comm.) who 

found it to belong to X. ulophyllodes (Fig. 4). 

Xanthoria fulva (Hoffm.) Poelt & Petutschnik does not appear to occur in 

the study area. 

22 21 0 1 2 3 4 5 6 7 8 9 

before 1910 

between 1910 and 1970 

after 1970 

FIG. 2. — Known distribution of Xanthoria candelaria in Belgium, Luxembourg 

and northern France, based on the study of herbarium material, using the IFBL-grid 

(squares of 4 × 4 km 2 ). 

A 

B 

C 

D 

E 

F 

G 

H 

J 

K 

L 

M 

N

-37- 

22 21 0 1 2 3 4 5 6 7 8 9 

before 1910 


after 1970 

Xanthoria fallax (Hepp) Arnold 

FIG. 3. — Known distribution of Xanthoria fallax in Belgium, Luxembourg and northern 

France, based on the study of herbarium material, using the IFBL-grid (squares of 

4 × 4 km 2 ). 

22 21 0 1 2 3 4 5 6 7 8 9 

before 1910 


after 1970 

FIG. 4. — Known distribution of Xanthoria ulophyllodes in Belgium, Luxembourg and 

northern France, based on the study of herbarium material, using the IFBL-grid (squares 

of 4 × 4 km 2 ). 

A 

B 

C 

D 

E 

F 

G 

H 

J 

K 

L 

M 

N 

A 

B 

C 

D 

E 

F 

G 

H 

J 

K 

L 

M 

N

Xanthoria fallax (Hepp) Arnold 

-38- 

Belgium, Mosan: Dave, au pied des Rochers du Néviaux (G5.47), 6.1968, paroi 

subverticale ombragée de calc. dolomitique, J. Lambinon 68/545 (LG); Comblainau-Pont, 

Les Tartines, tête des rochers calcaires au-dessus de l’hôtel ‘Relais des 

Gourmets’ (G7.33), 6.1967, paroi verticale exp. SW, J. Lambinon 67/282 (LG). – Ard.: 

La Roche-en-Ardenne, défilé de la route à l’entrée W de la localité (J7.13), 5.1960, 

rochers schisteux durs contre la route, J. Lambinon 60/597 (LG); Houffalize, dans la 

localité (départ de la route de Mabrompé) (J7.27), 5.1964, rochers (quartzophyllade) ± 

verticaux, exp. S, J. Lambinon 64/399 (LG); Peterskirche (comm. Reuland), près d’une 

petite chapelle sous roche, au début du chemin de Leithum (H8.55), 8.1964, rochers 

schisteux verticaux ensoleillés, J. Lambinon 64/1224 (LG); Peterskirche (comm. 

Reuland), vieux mur vertical de soutien de terres, bord route dans le village, exp. S 

(H8.55), 8.1964, J. Lambinon 64/1213 (LG); Burg-Reuland (H8.55), 8.1964, mur 

vertical un peu ombragé, exp. S, J. Lambinon 64/1206 (LG). 

Luxembourg, distr. unknown: S. loc., c. 1840, corticolous, F.-A. Tinant 15 (LUX). 

– Ard.: Michelau (rive gauche de la Sûre au N de Diekirch), muret dans le village 

(K8.34),.5.1966, J. Lambinon 66/248 (LG); Lellange (au SW de Bockholz-lez- 

Hosingen), vieux muret dans le village (K8.14), 5.1966, J. Lambinon 66/236 (LG); 

Brandenbourg, rochers schisteux subverticaux ensoleillés, près des ruines du châteaufort 

(K8.35), 9.1966, J. Lambinon 66/1494 (LG); Vianden, rochers schisteux au pied du 

vieux beffroi (K8.27), 6.1961, J. Lambinon 61/546 (LG); Clervaux, rochers schisteux 

au pied du château-fort (J8.44), 6.1961, J. Lambinon 61/606 (LG); Esch-sur-Sûre, 

rochers schisteux (avec flore calcicole) au pied du château-fort (K8.32), 6.1961, J. 

Lambinon 61/592 & 593 (LG); Esch-sur-Sûre, mur à la berge de la Sûre (K8.32), 

6.2002, sur un mur en pierres siliceuses, P. Diederich 15426 (h); ESE of Hosingen, 

Untereisenbach, centre, on S exp. schist-wall along road near restaurant ‘Holle Bolle 

Gijs’ (K8.16), 4.1988, P. van den Boom 6705 (h). 

France, Ard.: Ardennes, Fépin, rochers subverticaux éodévoniens au bord de la route de la rive 

gauche de la Meuse à hauteur du bois de Fépin (J5.54), 4.1968, J. Lambinon 68/176 (LG). 

See comments under Xanthoria. 

Xanthoria ulophyllodes Räsänen 

Belgium, Ard.: Ligneuville, dans le village, près du pont (G8.53), sur Aesculus, 

3.1961, J. Lambinon 61/130 (LG); Compogne (comm. de Bertogne) (J7.35), 5.1964, 

J. Lambinon 64/419 (LG); Gremelange (comm. Martelange), dans le village (K7.56), 

5.1964, J. Lambinon 64/598 (LG); Tintange, dans le village (K7.46), sur Fraxinus, 

1964, J. Lambinon 64/611 (LG); Radelange (comm. Martelange), près de l’église 

(K7.56), 5.1964, J. Lambinon 64/578 (LG); Burg-Reuland (H8.55), 8.1964, J. 

Lambinon 64/1207 (LG); Autelbas, près du château (L8.51), sur Aesculus, 8.1965, J. 

Lambinon 65/768 (LG); Amberloup, bord de la grand-route entre le village et Sprimont 

(J7.52), 2.1966, J. Lambinon 66/27 & 37 (LG). 

Luxembourg, Lorr.: Tuntingen (L8.43), sur Pyrus, 5.1891, J. Feltgen 308, 309 (LUX); 

au NNW de Diekirch, entre Friedhof et Kippenhof, bord de la route de Hoscheid 

(K8.35), sur Fraxinus, 9.1966, J. Lambinon 66/1489 (LG, LUX); Boevange-sur-Attert

-39- 

(L8.23), sur Tilia, le long d’une route, 1967, J. Lambinon 67/554 (LG); Erpeldange 

(près d’Ettelbruck), près de la Mairie (K8.45), sur Tilia, 7.1980, P. Diederich 2403 (h); 

Dippach, verger au N du village (M8.23), sur Malus, dans un verger, 3.1996, P. Diederich 

12360 (h); Graulinster, en bord de route dans le village (L8.38), 7.1995, P. Diederich 

12289 (h); au S de Gostingen (M9.11), sur Malus, 6.1979, P. Diederich 1299 (h). 

France, Boul.: Pas-de-Calais, between Oye-Plage and Marck (D21.34), on Ulmus along 

road, 1954, J. Barkman 4544 (L). – Lorr.: Meurthe-et-Moselle, S of Virton, 1 km N of 

Charency-Vezin, military graveyard with very old Tilia trees (M7.52), on Tilia, 1998, 

P. van den Boom 20037 (h). 

New for the study area. See under Xanthoria for further comments. 

*Zwackhiomyces immersae (Arnold) Grube & Triebel 

Luxembourg, Lorr.: entre Dudelange et Kayl, Haard (M8.54), sur Bacidia bagliettoana 

terricole, 7.2002, P. Diederich 15496 (h), J. Miadlikowska & D. Ertz. 

France, Mar.: Somme, au NE de Cayeux-sur-Mer, Brighton, à 500 m à l’W du phare, visà-vis 

du centre de vacances (H22.52), levée de galets, ancienne ballastière, végétation 

principalement terricole, sur B. bagliettoana, 7.2001, P. Diederich 15332 (h). 

Following GRUBE & HAFELLNER (1990), Z. immersae grows on Clauzadea 

species, and has additionally been collected before 1914 on Bacidia bagliettoana 

near Dunkerque in our study area (F Mar.). We report here the discovery of 

two recent collections on the same host, B. bagliettoana. More detailed studies, 

together with the examination of representative specimens on Clauzadea, will be 

necessary to find out if the material from both host genera is homogeneous, or if 

that on Bacidia belongs to a different, yet undescribed species. 

SUMMARY 

If expanded to the Boulogne and Picardy districts in northern France 

(see above), and together with the data presented in this paper and some 

other recently published papers (see above), the checklist of the lichens and 

lichenicolous fungi recently published by DIEDERICH & SÉRUSIAUX (2000) must 

be emended as follows: 

Species to be added to the checklist: 

*Abrothallus caerulescens Kotte 

*Abrothallus cladoniae R. Sant. & D. Hawksw. 

Agonimia gelatinosa (Ach.) Brand & Diederich 

*Arthonia digitatae Hafellner 

Bacidia brandii Coppins & van den Boom 

Bacidia laurocerasi (Duby) Zahlbr. 

Bagliettoa parmigerella (Zahlbr.) Vězda & Poelt 

Bryoria capillaris (Ach.) Brodo & D. Hawksw.

-40- 

Caloplaca cerinelloides (Erichsen) Poelt 

Caloplaca marina (Wedd.) Du Rietz 

Caloplaca microthallina (Wedd.) Zahlbr. 

Caloplaca thallincola (Wedd.) Du Rietz 

Celothelium ischnobelum (Nyl.) Aguirre 

Chrysothrix flavovirens Tønsb. 

Cladonia cyathomorpha W. Watson 

Cladonia monomorpha Aptroot, Sipman & van Herk 

*Cladoniicola staurospora Diederich, van den Boom & Aptroot 

Cliostomum flavidulum Hafellner & Kalb 

Collema coccophorum Tuck. 

Cryptolechia carneolutea (Urner) A. Massal. 

*Didymellopsis collematum (J. Steiner) Grube & Hafellner 

*Dinemasporium strigosum (Fr.) Sacc. 

(+)Epigloea renitens (Grummann) Döbbeler 

Gyalidea minuta van den Boom & Vězda 

*Intralichen baccisporus D. Hawksw. & M. S. Cole 

*Kalaallia reactiva Alstrup & D. Hawksw. 

*Lasiosphaeriopsis salisburyi D. Hawksw. & Sivanesan 

Lecanactis dilleniana (Ach.) Körb. 

Lecania atrynoides Knowles 

Lecanora jamesii Laundon 

Lecanora leuckertiana Zedda 

Lecanora zosterae (Ach.) Nyl. 

Lecidea siderolithica Müll. Arg. 

Leiorreuma lyellii (Sm.) Staiger 

Lichina confinis (Müller) Agardh 

Micarea viridileprosa Coppins & van den Boom 

Mycomicrothelia confusa D. Hawksw. 

*Neolamya peltigerae (Mont.) Theiss. & Syd. 

Opegrapha gyrocarpa Flotow 

Opegrapha sorediifera P. James 

Parmelia ernstiae Feuerer & A. Thell 

Peltigera extenuata (Vain.) Lojka 

Peltigera monticola Vitik. 

*Phacopsis fusca (Triebel & Rambold) Diederich 

*Polydesmia lichenis Huhtinen & R. Sant. 

*Pronectria oligospora Lowen & Rogerson var. octospora Etayo 

*Pronectria pertusariicola Lowen 

Protoparmelia oleaginea (Harmand) Coppins 

Ramonia interjecta Coppins 

Rimularia insularis (Nyl.) Rambold & Hertel

-41- 

*Roselliniella atlantica Matzer & Hafellner 

*Stigmidium aggregatum (Mudd) D. Hawksw. 

*Stigmidium mycobilimbiae Cl. Roux, Triebel & Etayo 

*Stigmidium peltideae (Vain.) R. Sant. 

*Stromatopogon cladoniae Diederich & Sérus. 

*Trichonectria anisospora (Lowen) van den Boom & Diederich 

*Unguiculariopsis thallophila (P. Karst.) W. Y. Zhuang 

Verrucaria elaeina Borrer 

Verrucaria erichsenii Zschacke 

Verrucaria halizoa Leight. 

Verrucaria hegetschweileri Körb. 

Verrucaria maura Wahlenb. 

Verrucaria papillosa Ach. 

Verrucaria sandstedei B. de Lesd. 

Xanthoria ulophyllodes Räsänen 

Species confirmed: 

Clauzadea chondrodes (A. Massal.) Clauzade & Cl. Roux 

(*)Epilichen scabrosus (Ach.) Hafellner 

Lempholemma chalazanum (Ach.) B. de Lesd. 

Species to be deleted: 

Bryoria implexa (Hoffm.) Brodo & D. Hawksw. 

*Phacopsis oxyspora (Tul.) Triebel & Rambold 

Rhizocarpon plicatile (Leight.) A. L. Sm. 

Verrucaria sp. (see DIEDERICH & SÉRUSIAUX, 2000: 174) is V. macrostoma 

*Vouauxiella verrucosa (Vouaux) Petr. & Syd. 

[Cliostomum corrugatum (Ach.) Fr. was not accepted in the Checklist, but 

reported from a locality in France close to the study area; with the expansion of this 

area to a larger part of northern France, C. corrugatum should now be added to the 

checklist; however, SPARRIUS et al. (2002) show that the corresponding specimen 

belongs to C. griffithii, and C. corrugatum definitely does not exist in the area.] 

Taxonomic and nomenclatural changes: 

Caloplaca maritima (B. de Lesd.) B. de Lesd., instead of C. maritima B. de Lesd. 

Cladina is best included in Cladonia as a subgenus (see DIEDERICH & SÉRUSIAUX, 

2000 for nomenclatural changes) 

Cladonia pulvinata (Sandst.) van Herk & Aptroot, instead of C. cervicornis 

subsp. pulvinata (Sandst.) Ahti 

Cladonia verticillata (Hoffm.) Schaer., instead of C. cervicornis subsp. 

verticillata (Hoffm.) Ahti 

Diplotomma alboatrum (Hoffm.) Flot., instead of Buellia alboatra (Hoffm.) Th. Fr. 

Diplotomma dispersum (Kremp.) Arnold, instead of Buellia subdispersa Mig.

-42- 

Diplotomma hedinii (H. Magn.) comb. ined. (provisionally placed here, ICBN 

art. 34.1b) (syn.: Buellia hedinii H. Magn., Diplotomma epipolium auct., 

non (Ach.) Arnold), instead of Buellia venusta (Körb.) Lettau 

Fellhanera gyrophorica Sérus., Coppins, Diederich & Scheidegger, instead of 

Fellhanera sp. 

Graphis britannica Staiger is a new name for Graphina anguina auct. europ. 

Illosporiopsis christiansenii (B. L. Brady & D. Hawksw.) D. Hawksw., instead 

of Hobsonia christiansenii B. L. Brady & D. Hawksw. 

Lecanora dispersella auct., non Steiner, instead of L. crenulata auct., non 

(Mont.) Müll. Arg. 

Lecanora flotoviana Spreng., instead of L. flotowiana (see LAUNDON, 2003) 

Lepraria flavescens Cl. Roux & Tønsberg, instead of L. flavescens Clauzade 

& Cl. Roux 

Lepraria membranacea (Dicks.) Vain., instead of Leproloma membranaceum 

(Dicks.) Vain. 

Lepraria vouauxii (Hue) R. C. Harris, instead of Leproloma vouauxii (Hue) J. 

R. Laundon 

Lichenomphalia hudsoniana (H. S. Jenn.) Redhead et al., instead of Omphalina 

hudsoniana (H. S. Jenn.) H. E. Bigelow 

Lichenomphalia umbellifera (L.: Fr.) Redhead et al., instead of Omphalina 

umbellifera (L.: Fr.) Quél. 

Lichenopeltella hydrophila R. Sant., instead of L. hydrophila R. Sant. ined. 

Marchandiobasidium Diederich & Schultheis and M. aurantiacum Diederich 

& Schultheis are the teleomorphs of Marchandiomyces Diederich & D. 

Hawksw. and M. aurantiacus (Lasch) Diederich & Etayo 

Merismatium deminutum (Arnold) Cl. Roux & Nav.-Ros, instead of Polyblastia 

deminuta Arnold 

Mycobilimbia epixanthoides (Nyl.) Vitik., Ahti, Kuusinen, Lommi & T. 

Ulvinen, instead of Biatora epixanthoides (Nyl.) Diederich 

Mycobilimbia lurida (Ach.) Hafellner & Türk, instead of Psora lurida (Ach.) DC. 

Mycobilimbia pilularis (Körb.) Hafellner & Türk, instead of Biatora 

sphaeroides (Dicks.) Körb. 

Myxobilimbia accedens (Arnold) Hafellner, instead of Bacidia accedens 

(Arnold) Lettau, considered as a synonym of M. sabuletorum in DIEDERICH 

& SÉRUSIAUX (2000: 127) 

Myxobilimbia lobulata (Sommerf.) Hafellner, instead of Mycobilimbia 

lobulata (Sommerf.) Hafellner 

Myxobilimbia sabuletorum (Schreb.) Hafellner, instead of Mycobilimbia 

sabuletorum (Schreb.) Hafellner 

Myxophora leptogiophila (G. Winter) Nik. Hoffm. & Hafellner, instead of 

Cyanomyces leptogiophila (G. Winter) Nik. Hoffm. & Hafellner comb. ined.

-43- 

Opegrapha niveoatra (Borrer) J. R. Laundon is best treated as a distinct 

species, instead of a variety as O. vulgata var. subsiderella Nyl. (B. J. 

Coppins, pers. comm.) 

Physcia leptalea (Ach.) DC. nom. cons., instead of P. semipinnata (J. F. Gmel.) 

Moberg 

Protopannaria pezizoides (Weber) P. M. Jørg. & S. Ekman, instead of Pannaria 

pezizoides (Weber) Trev. 

Psoroglaena abscondita (Coppins & Vězda) Hafellner & Türk, instead of 

Macentina abscondita Coppins & Vězda 

Tremella caloplacae (Zahlbr.) Diederich, instead of Lindauopsis caloplacae Zahlbr. 

Number of species present in the area of study: 

Number of species accepted by Diederich & Sérusiaux (2000) 1151 

Number of species to be added +68 

Number of species to be deleted -5 

Number of species known in the area of study in 2003 1214 

ACKNOWLEDGMENTS 

We wish to thank very warmly our colleagues and friends for the specimens made 

available to us, or for their help in identifying difficult collections: Prof./Dr A. Aptroot, 

M. Brand, O. Breuss, J. M. Cepeda, B. J. Coppins, J.-P. Duvivier, H. Hertel, O. Heylen, 

J. Lambinon, E. López de Silanes, G. Marson, B. Meyer, J. Miadlikowska, A. Orange, 

G. Samuels, L. Sparrius, A. Thell, R. Türk, D. Van den Broek and V. Wirth. The curators 

of BR, HBG, LG, LUX, MSC, STU, NY kindly allowed the study of specimens in their 

care. We also like to acknowledge the most precious help of Prof. J. Lambinon who 

carefully read the manuscript and made several valuable suggestions. 

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LEJEUNIA - Lichens of Belgium, Luxembourg and northern France

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