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Studies on the Lichen Family Thelotremataceae in Tasmania. The Genus Chroodiscus and its Relatives

Published online by Cambridge University Press:  28 March 2007

Gintaras Kantvilas  and
Antonín Vězda
Gintaras Kantvilas
Affiliation:
Tasmanian Herbarium, GPO Box 252-04, Hobart, Tasmania 7001, Australia
Antonín Vězda
Affiliation:
Botanical Institute, T´bor 28a, CZ-60200, Brno, Czech Republic
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Abstract

The Tasmanian species of the family Thelotremataceae with thin-walled ascospores and exfoliating, chroodiscoid apothecia are studied in detail. Problems in the delimitation of genera are discussed, and characters such as the morphology of the apothecia, structure and form of the exciple, presence of periphyses, ascus structure, ascospore morphology and thallus chemistry are evaluated. The concept of the typically foliicolous genus Chroodiscus (Müll. Arg.) Müll. Arg. is expanded to include corticolous and terricolous species, and the new taxa C. asteliae Kantvilas & Vězda, C. australis Kantvilas & Vězda, C. australis subsp. tasmanicus Kantvilas & Vězda, C. lamelliferus Kantvilas & Vězda and C. minor Kantvilas & Vězda are described and illustrated. The related Australasian species, C. megalophthalmus (Müll. Arg.) Vězda & Kantvilas is also treated. Two new genera are also described. Pseudoramonia Kantvilas & Vězda, based on the Venezuelan species, P. stipitata (Vězda & Hertel) Kantvilas & Vězda, is introduced to accommodate P. richeae Kantvilas & Vězda; Topeliopsis Kantvilas & Vězda is described to include the Tasmanian taxa, T. muscicola Kantvilas & Vězda and T. rugosa Kantvilas & Vězda, and the North American species T. toensbergii Vězda & Kantvilas.

Type
Research Article
Information
The Lichenologist , Volume 32 , Issue 4 , July 2000 , pp. 325 - 357
Copyright
Copyright © British Lichen Society 2000

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