New records of Pluteus (Pluteaceae, Agaricales) from Brazil

摘要

The occurrence of some previously unreported species of Pluteus from Brazil (P. aquosus, P. nigrolineatus, and P. globiger) is reported. Collections of P. albostipitatus and P. beniensis are also described from Rio Grande do Sul State. All taxa are illustrated and discussed. The knowledge of the genus Pluteus Fr. in Brazil started with Rick (1907, 1919, 1930, 1938) from the Rio Grande do Sul State. In his posthumous work (Rick 1961), Rick reported 18 species from this State, some described as new species: P. cristatulus Rick, P. fibrillosus Rick, P. leptonia Rick, P. sensitivus Rick, P. straminellus Rick, and P. velatus Rick. Singer (1953, 1959) studied several Rick's collections and considered most of them either dubious (due to the lack of preserved material) or synonyms of already described species in Pluteus and other genera (e.g. Entoloma (Fr.) P. Kumm.).