Abstract
While conducting a survey of freshwater fungi in the temperate region of southern Australia, we came across two previously undiscovered anamorphic Ascomycota, a phoma-like coelomycete and a dictyochaeta-like hyphomycete. The coelomycetous fungus was classified in the family Morosphaeriaceae (Pleosporales) as a new genus, primarily supported by molecular data. We hereby introduce Minivolcanus unicellularis, the new genus and species, accompanied by both morphological and molecular evidence. Additionally, the dictyochaeta-like hyphomycete was placed in the genus Achrochaeta in the Chaetosphaeriaceae (Chaetosphaeriales) based on a combination of morphological characteristics and phylogenetic analyses utilising ITS, 28S, and TEF1 sequences. This newly identified species is proposed as Achrochaeta rivulata, the second species described within this genus. These findings expand our knowledge of fungal diversity in the region.
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