n. sp. (Diplogastridae) isolated from the mushroom in Kyoto, Japan.

A new species of was isolated from fruiting bodies of the wood-decaying fungus collected from Kyoto, Japan. Attempts to culture it using bacteria, yeast, and freeze-killed wax moth larvae as food or substrate failed. The eurystomatous form of the species was not found in the collected material, and the species is typologically characterized by: its 'small' stoma with thin, membrane-like cheilostomatal plates, a small triangular right subventral tooth, thorn-like dorsal tooth, and small left subventral denticles; a short, blunt male tail spike; and a short, conical female tail. Although the posterior probability support was not high (66%), phylogenetic analysis of both small and large ribosomal RNA gene subunits suggests that the species is closely related to and . . The new species can be distinguished from those two by its diagnostic characters comprising the stomatal morphology and male and female tail characters.