A number of water‐borne fungi with branched conidia have been shown to be basidiomycetes. These fungi resemble aquatic hyphomyectes in their habitat, conidial morphology and ontogeny. Their conidia are typically tetraradiate or elaborately branched.Ingoldiella hamataandTaeniospora gracilis,which produce clamped, tetraradiate conidia, are anamorphs connected to the teleomorphsSistotrema hamalumandLeptosporomyces galzinii,respectively. Both teleomorphs are members of the Corticiaceae.Dendrosporomyces proliferandD. splendens,which produce non‐clamped conidia resembling the aquatic hyphomyceteDendrospora,have binucleate conidia and typical dolipore septa are present. Other water‐borne fungi with basidiomycete affinities includeIngoldiella fibulataandTricladiomyces malays