Resupinate polypores from mixed ombrophilous forests in southern Brazil

During a survey of polypore fungi in the municipality of São Francisco de Paula, Rio Grande do Sul State, Brazil, 24 resupinate species were identified. Trechispora mollusca, Antrodia variiformis, Diplomitoporus venezuelicus, and Flaviporus subundatus, rare species in Brazil, are fully described, discussed and illustrated. Comments are also given on Fomitiporia maxonii, recorded for the first time from Rio Grande do Sul State. An identification key and a checklist of the species are presented.