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Korean Megacollybia specimens. A~C, G, Fruit-bodies of M. clitocyboidea (A, KA12-0211; B, G, KA12-0459; C, KA12-0596); D~F, H, I, Fruit-bodies of M. marginata (D, KA12-0113; E, KA12-0146; F, H, I, KA12-1329) (scale bars = ca. 5 cm).
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The diversity of the genus Megacollybia in Korea was examined based on morphological observation and analysis of molecular data. Currently, the genus is consisted of nine species with a global distribution. However, only M. platyphylla has been reported in the floral survey of Korea. During our re-evaluation of the taxonomic diversity of Megacollyb...
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... and morphological observations. The collected Megacollybia specimens (Table 1) were dried and deposited in the herbarium of Korea National Arboretum (KA) (Fig. 1). Reliable DNA sequence data for other Megacollybia spp. and outgroup species were retrieved from Genbank based on the study of Hughes et al. [2] for the Korean Megacollybia Species, M. clitocyboidea and M. marginata 23 phylogenetic analyses (Table 1, Fig. 2). Macro-morphological characteristics were determined based on the field notes ...Citations
... Phylogenetic analyses were performed using nrITS sequences generated from our collections along with the sequences retrieved from previously published phylogenies (Hughes et al., 2007;Kim et al., 2014), BLAST searches (Altschul et al., 1997), and data retrieved from GenBank (Clark et al., 2016). In this study, a dataset of 31 nrITS sequences including our sequences was used to analyze the data. ...
In the present communication, a species of Megacollybia (M. platyphylla) belonging to the family Marasmiaceae has been described and illustrated for the first time in the Indian mycobiota. This is a lignicolous species found on the dead tree trunks of Cedrus deodara from the Union Territory of Jammu and Kashmir. Here, we investigated the identity of M. platyphylla based on detailed morphology and nrITS‐based phylogeny.
... Gerronema kuruvense is always distinctly yellow, has small basidiomata (pileus < 11 mm in diameter) and true pileocystidia, and lacks cheilocystidia (Latha et al. 2018). Finally, G. strombodes, distributed in North America and Asia, differs from G. baishanzuense in having larger basidiomata, a white to grayish white pileus (up to 80 mm wide), smooth pileipellis hyphae, and the absence of hymenial cystidia (Singer 1970;Antonín et al. 2008;Kim et al. 2014). G. citrinum (Corner) Pegler (Pegler 1983) and G. tenue Dennis (Dennis 1961), are allied with G. baishanzuense, but their lamellae edges without cheilocystidia. ...
... Compared with G. microcarpum, G. subchrysophyllum (Murrill) Singer has an olive-umber pileus fading to grayish when old, larger and ellipsoid basidiospores (4.3-8.5 × 2.5-6.3 μm), and sometimes basidiole-like cheilocystidia (Singer 1970). Gerronema keralense and G. strombodes are easily mistaken for G. microcarpum, but both the two closely related species are distinguishable by their absence of cheilocystidia or their partially thick-walled pileipellis and stipitipellis (Singer 1970;Antonín et al. 2008;Latha et al. 2018;Kim et al. 2014). ...
... Having a sarcodimitic tissue structure, G. nemorale fits well within the currently restricted concept of the genus Gerronema (Redhead 1986;Norvell et al. 1994). Gerronema nemorale seems to be rather common in the East Asian region (Takahashi 2000;Antonín et al. 2008;Kim et al. 2014;Aqdus and Khalid 2021). Kim et al. (2014) has reported a basidiospore size of 6.0-8.2 × 3.5-4.8 ...
Only three Gerronema (Porotheleaceae) species have been previously recorded in China. Here, we report collections of a fourth species in China: G. nemorale Har. Takah., which is widely distributed in Chinese temperate to subtropical zones. We also formally describe three new species, collected from Anhui, Fujian, and Zhejiang provinces: G. baishanzuense sp. nov., G. microcarpum sp. nov., and G. zhujian sp. nov. Furthermore, we include the results of a phylogenetic analysis of Porotheleaceae based on a multi-locus (ITS + nLSU) dataset. The results, which indicate that Gerronema is polyphyletic, support the taxonomic recognition of the three new species. Morphological descriptions, photographs, line drawings, and comparisons with closely related taxa are presented for the new and newly recorded species. A key to the seven species of Gerronema in China is also provided.
The taxonomy and phylogeny of the hydropoid clade (genera Clitocybula s.l., Megacollybia, Leucoinocybe gen. nov., Hydropus, Trogia, Gerronema, Porotheleum and Lignomphalia gen. nov.)in Europe is studied using morphological and molecular approaches; the first three genera in detail including all known European species. Only two European species remain in Clitocybula s.str., Clitocybula lacerata and Clitocybula familia. The European C. lacerata is a species complex which should be treated as C. lacerata agg. at the current state of knowledge. A neotype originating from type area was designated to fix the application of the name. The presence of American species Clitocybula abundans in Europe is insufficiently proved. “Clitocybula dryadicola ˮ belongs to the genus Hydropus, and Clitocybula tilieti has an unclear systematic position. The results showed that Megacollybia and Leucoinocybe represent independent genera separated from Clitocybula. The genus Leucoinocybe is validly published with two European species, Leucoinocybe lenta and Leucoinocybe taniae. “Clitocybula flavoaurantia” proved to be conspecific with the latter species. The genus Lignomphalia is published for “Pseudoomphalina lignicola”, a lignicolous omphalinoid species. The Indian “Clitocybula sulcata” is transferred to Leucoinocybe and “Clitocybula atrialba” to Gerronema. The first European records of Megacollybia marginata are published.
