Abstract
Four aquatic ascomycetes are reported from freshwater habitats in Australia for the first time. Three taxa: Bombardia sp., Jahnula australiensis sp. nov., and Savoryella aquatica sp. nov, are illustrated with interference contrast light micrographs. The new fungi are described and their taxonomic placement discussed.* Part IV, Aust. Syst. Bot. 1992, 5, 407–14.