A. castaneum A. dregeanum Australohydnum is a genus of resupinate fungi in the family Phanerochaetaceae.
The genus was circumscribed in 1978 by Swiss mycologist Walter Jülich with the Australian fungus Australohydnum griseofuscescens (formerly Hydnum griseo-fuscescens Reichardt) as the type species.
[1] A. dregeanum and A. castaneum were added to the genus in 1990 and 2006, respectively.
[2][3] Australohydnum griseofuscescens is now considered to be synonymous with Irpex vellereus.
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