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Abstract
During fieldwork in Guyana several unusual and distinctive taxa of polypores were collected, three of which are described here as new. The first of these, Amauroderma coltricioides is the first species known in the Ganodermataceae with smooth basidiospores. Coltricia verrucata and Coltriciella navispora also are described as new, and a key to the neotropical species of Coltricia is provided. Finally, a checklist of 73 poroid fungi from Guyana is given, of which 29 are new records for the country.
This work was made possible by grants from the National Geographic Society's Committee for Research and Exploration and the Smithsonian Institution's Biological Diversity of the Guianas Program to TWH, and an Explorers Club, Washington Group Exploration and Field Research Grant to MCA. Mimi Chin, Leonard Williams, Christopher Andrew, Benny Cheong and Steve Miller provided field assistance in Guyana. We are grateful to Jean-Marc Moncalvo for sharing his database of Ganodermataceae sequences and to Robert Gilbertson and one other reviewer for their valuable comments on this manuscript. This paper is No. 74 in the Smithsonian Institution's Biological Diversity of the Guianas ProgramPUBLICation series.