Abstract
Two new species of Calliderma, C. fibulatum and C. rimosum, collected in fragments of the Atlantic Rainforest, São Paulo, Brazil, are described and compared with similar taxa including Entoloma pruinatocutis, Inopilus entolomoides and E. tucuchense. After a morphological study of the existing holotypes two new combinations (viz. Calliderma pruinatocutis and C. tucuchense) are proposed. I. entolomoides is considered a synonym of C. pruinatocutis. The two new species are described, with illustrations and SEM photographs of basidiospores and pileipellis structure, including most of the holotypes examined. A key for the species of Calliderma occurring in Brazil is provided.
The authors thank Dr Tarciso de Sousa Filgueiras, Reserva Ecológica do IBGE, for assisting with the Latin descriptions. We are grateful for the help of Dr Timothy J. Baroni, Dr Elizabeth M. Woodgyer and Reinhard Berndt from CORT, K and ZT respectively for the loan of specimens. We especially thank Dr Timothy J. Baroni, State University of New York College at Cortland for his help in answering many questions of the first author. This study was supported by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP grant 06/58549-4 to Fernanda Karstedt and FAPESP grant 04/04319-2 to Marina Capelari).