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Pendulous Usnea species (Parmeliaceae, lichenized Ascomycota) in tropical South America and the Galapagos

Published online by Cambridge University Press:  24 June 2013

Camille TRUONG ,
Juan Manuel RODRIGUEZ  and
Philippe CLERC
Camille TRUONG
Affiliation:
Conservatoire et Jardin Botaniques de la Ville de Genève, CP 60, 1292 Chambésy, Switzerland ; Laboratoire de Systématique Végétale et Biodiversité, Faculté des Sciences de l'Université de Genève, CP 60, 1292 Chambésy, Switzerland. Email: camille.truong@ville-ge.ch
Juan Manuel RODRIGUEZ
Affiliation:
Centro de Ecología y Recursos Naturales Renovables, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, CONICET, Av. Vélez Sarsfield 299, Córdoba, Argentina
Philippe CLERC
Affiliation:
Conservatoire et Jardin Botaniques de la Ville de Genève, CP 60, 1292 Chambésy, Switzerland ; Laboratoire de Systématique Végétale et Biodiversité, Faculté des Sciences de l'Université de Genève, CP 60, 1292 Chambésy, Switzerland. Email: camille.truong@ville-ge.ch
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Abstract

The diversity of pendulous Usnea species in tropical South America (Bolivia, Brazil, Colombia, Ecuador, Paraguay, Peru and Venezuela) and the Galapagos Islands is discussed with reference to 23 species. Usnea crenulata Truong & Clerc is newly described. Usnea articulata, U. deformis, U. dimorpha, U. geissleriana, U. merrillii, U. perhispidella, U. sanctaeritae, U. subflammea and U. transitoria are newly reported for South America. Modern descriptions are provided for Usnea amabilis, U. arthroclada, U. dodgei, U. humboldtii and U. regia. We propose to reject the synonymy of U. hesperina with U. schadenbergiana, and the valid name for U. hesperina is therefore U. subgracilis. Distinct patterns of unidentified triterpenoids have been detected by thin-layer chromatography and are used to characterize several species within this group. The morphology, branch anatomy, chemistry, ecology and distribution of each species are given, together with an identification key.

Keywords

endemismlichensmacrolichensNeotropicstaxonomy
Type
Articles
Information
The Lichenologist , Volume 45 , Issue 4 , July 2013 , pp. 505 - 543
Copyright
Copyright © British Lichen Society 2013 

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