Hypomyces tremellicola and Sphaerostilbella micropori (Hypocreaceae, Ascomycota) were collected from sites in Japan, and pure cultures were obtained from each species. Their detailed descriptions are provided, and both species have been added to the Japanese mycobiota.

Japanese specimens and cultures previously designated Auricularia auricula-judae or A. polytricha were examined taxonomically based on molecular phylogeny and morphological comparison. A total 26 samples, including specimens considered as A. auricula-judae, were identified as A. heimuer, A. minutissima, A. thailandica, and A. villosula, but A. auricula-judae s. str. was not found. Similarly, 26 samples including specimens considered as A. polytricha were identified as A. cornea, but neither A. polytricha s.str nor A. nigricans were found. This result suggests that A. cornea is a fungus previously considered as A. polytricha in Japan.