Hostname: page-component-76fb5796d-wq484 Total loading time: 0 Render date: 2024-04-25T08:09:09.767Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Published online by Cambridge University Press:  07 May 2013

Camille TRUONG  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
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
Get access Rights & Permissions [Opens in a new window]

Abstract

Eumitrioid Usnea species are characterized by a tubular central axis throughout the entire thallus. Four species were identified in South America: Usnea baileyi is a (sub-) tropical species occurring both in continental South America and the Galapagos; U. perplectata has a scattered distribution worldwide and occurs in continental South America, mainly on the eastern range; U. flaveola and the newly described species U. subflaveola are both so far endemic to the Neotropical Andes. Distinct chemotypes, as well as anatomical characters, such as the thickness ratio of the medulla or the presence of medullar pigmentation, are diagnostic in delimiting these species. A detailed description of the species is provided together with an identification key.

Keywords

chemistryendemismlichensmorphologyNeotropicstaxonomy
Type
Articles
Information
The Lichenologist , Volume 45 , Issue 3 , May 2013 , pp. 383 - 395
Copyright
Copyright © British Lichen Society 2013

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Articus, K. (2004) Neuropogon and the phylogeny of Usnea s.l. (Parmeliaceae, lichenized Ascomycetes). Taxon 53: 925–934.CrossRefGoogle Scholar
Brodo, I. M., Sharnoff, S. D. & Sharnoff, S. (2001) Lichens of North America. New Haven: Yale University Press.Google Scholar
Clerc, P. (1987 a) On the morphology of soralia in the genus Usnea . Bibliotheca Lichenologica 25: 99–102.Google Scholar
Clerc, P. (1987 b) Systematics of the Usnea fragilescens aggregate and its distribution in Scandinavia. Nordic Journal of Botany 7: 479–495.CrossRefGoogle Scholar
Clerc, P. (1998) Species concepts in the genus Usnea (lichenized Ascomycetes). Lichenologist 30: 321–340.CrossRefGoogle Scholar
Clerc, P. (2008) Usnea. In Lichen Flora of the Greater Sonoran Desert Region Vol. 3 (Nash, T. H. III, Gries, C. & Bungartz, F., eds.): 302–335. Tempe, Arizona: Lichens Unlimited, Arizona State University.Google Scholar
Clerc, P. (2011) Usnea. In Nordic Lichen Flora Vol. 4 (Thell, A. & Moberg, R., eds): 107–127. Uddevalla: Nordic Lichen Society.Google Scholar
Clerc, P. & Herrera-Campos, M. A. (1997) Saxicolous species of Usnea subgenus Usnea (lichenized Ascomycetes) in North America. Bryologist 100: 281–301.CrossRefGoogle Scholar
Culberson, C. F. & Ammann, K. (1979) Standardmethode zur Dünnschichtchromatographie von Flechtensubstanzen. Herzogia 5: 1–24.CrossRefGoogle Scholar
Culberson, C. F. & Johnson, A. (1982) Substitution of methyl tert-butyl ether for diethyl ether in the standardized thin-layer chromatographic method for lichen products. Journal of Chromatography 238: 483–487.CrossRefGoogle Scholar
Herrera-Campos, M. A., Clerc, P. & Nash, T. H. III (1998) Pendulous species of Usnea from the temperate forests in Mexico. Bryologist 101: 303–329.CrossRefGoogle Scholar
Krog, H. (1994) New observations on Usnea subgenus Eumitria in eastern and central Africa. In Proceedings of the XIII plenary meeting AETFAT Vol. 2 (Seyani, J. & Chikuni, A., eds): 813–821. Malawi: National Herbarium and Botanic Gardens.Google Scholar
Motyka, J. (1936) Lichenum Generis Usnea Studium Monographicum. Pars Systematica (Vol. 1). Leopoli: privately printed.Google Scholar
Ohmura, Y. (2001) Taxonomic study of the genus Usnea (lichenized Ascomycetes) in Japan and Taiwan. Journal of the Hattori Botanical Laboratory 90: 1–96.Google Scholar
Ohmura, Y. (2002) Phylogenetic evaluation of infrageneric groups of the genus Usnea based on ITS regions in rDNA. Journal of the Hattori Botanical Laboratory 92: 231–243.Google Scholar
Ohmura, Y. (2012) A synopsis of the lichen genus Usnea (Parmeliaceae, Ascomycota) in Taiwan. Memoirs of the National Museum of Nature and Science 48: 91–137.Google Scholar
Ohmura, Y. & Kanda, H. (2004) Taxonomic status of section Neuropogon in the genus Usnea elucidated by morphological comparisons and ITS rDNA sequences. Lichenologist 36: 217–225.CrossRefGoogle Scholar
Rodriguez, J. M., Estrabou, C., Truong, C. & Clerc, P. (2011) The saxicolous species of the genus Usnea subgenus Usnea (Parmeliaceae) in Argentina and Uruguay. Bryologist 114: 504–525.CrossRefGoogle Scholar
Rogers, R. W. & Stevens, G. N. (1988) The Usnea baileyi complex (Parmeliaceae, lichenised Ascomycetes) in Australia. Australian Systematic Botany 1: 355–361.CrossRefGoogle Scholar
Stevens, G. N. (1999) A revison of the lichen family Usneaceae in Australia. Bibliotheca Lichenologica 72: 1–128.Google Scholar
Stevens, G. N. (2004) Usneaceae. In Flora of Australia Vol. 56A, Lichens 4 (McCarthy, P. M. & Mallett, K., eds): 78–98 & 107–115. Melbourne: ABRS/CSIRO.Google Scholar
Stirton, J. (1882) Notes on the genus Usnea with descriptions of new species. Scottish Naturalist 6: 292–297.Google Scholar
Swinscow, T. D. V. & Krog, H. (1974) Usnea subgenus Eumitria in East Africa. Norwegian Journal of Botany 21: 165–185.Google Scholar
Swinscow, T. D. V. & Krog, H. (1986) Usnea antiqua sp. nov. described from Tanzania. Lichenologist 18: 293–295.CrossRefGoogle Scholar
Truong, C. & Clerc, P. (2012) The lichen genus Usnea (Parmeliaceae) in tropical South America: species with a pigmented medulla, reacting C+ yellow. Lichenologist 44: 1–13.CrossRefGoogle Scholar
Truong, C., Bungartz, F. & Clerc, P. (2011) The lichen genus Usnea (Parmeliaceae) in the tropical Andes and the Galapagos: species with a red-orange cortical or subcortical pigmentation. Bryologist 114: 477–503.CrossRefGoogle Scholar
Wirtz, N., Printzen, C., Sancho, L. & Lumbsch, H. T. (2006) The phylogeny and classification of Neuropogon and Usnea (Parmeliaceae, Ascomycota) revisited. Taxon 55: 367–376.CrossRefGoogle Scholar