Haasiella

[4] It is a monotypic genus that contains only the species Haasiella venustissima.

[1] Haasiella splendidissima, formerly considered to be a distinct species based on its 4-spored basidia, was found by a DNA study to be synonymous with Haasiella venustissima.

[1] Haasiella venustissima is only known from Europe and is saprotrophic on wood.

[1][5] Haasiella was described as a new genus in 1966 by Czech mycologists František Kotlaba and Zdeněk Pouzar.

[1] The genus name is in honour of Hans Haas, a German mycologist, who was a specialist on Agaricus from Schnait near Stuttgart.