Protousnea (Parmeliaceae), a Genus Endemic to Southern South America
Date
2005
Authors
Calvelo, Susana
Stocker-Worgotter, Elfie
Liberatore, Sandra
Elix, John
Journal Title
Journal ISSN
Volume Title
Publisher
American Bryological and Lichenological Society Inc.
Abstract
A comprehensive revision of the genus Protousnea is presented based on morphological, chemical, anatomical, and extensive field studies in the Patagonian Andes and Tierra del Fuego, as well as by comparisons with herbarium material. A complete chemical profile is detailed for each species and sekikaic acid has been shown to be the major medullary metabolite. The new despide, 4′-O-demethylsubsekikaic acid, is described for the first time. The circumscription of species and intraspecific variability is discussed with reference to key morphological, anatomical, and chemical characters, as well as ecological preferences. Conidia are described for the first time. Protousnea malacea and P. scrobiculata have been synonymized with P. poeppigii. A key to the species is given. All the species are illustrated and new data are presented on their distribution, substrate preferences, and ecology.
Description
Keywords
Keywords: Lichens; Nothofagus forests; Patagonia; Protousnea
Citation
Collections
Source
The Bryologist
Type
Journal article