Studies in the Lichen Family Pannariaceae III. The Genus Fuscoderma, with Additional Notes and a Revised Key to Leioderma

Abstract
Leioderma subg. Fuscoderma D. Galloway & P. M. Jørg., is shown to be a distinct genus, confined to Tasmania and New Zealand and comprising three species: Fuscoderma amphibolum (Knight) comb, nov., F. applanatum (D. Galloway & P. M. Jørg.) comb, nov., and F. limbatum sp. nov. A key to the species is given. A revised key to Leioderma is also presented and a second locality (Ecuador) is reported for the Brazilian species L. glabrum D. Galloway & P. M. Jørg.

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