Echigoshirayukidake (Basidiomycetes-X)

Echigoshirayukidake (Japanese: 越後白雪茸), commonly called Basidiomycetes-X or BDM-X, is a sclerotium of Ceraceomyces tessulatus. It is classified as a basidiomycete because of its beak-shaped processes (Clamp connections). It does not form basidia and only forms sclerotia (hyphal masses) when cultured. In these respects, BDM-X is distinguished from other basidiomycetes. BDM-X is cultured and consumed as an edible mushroom. The mushroom, Basidiomycetes-X (BDM-X), echigoshirayukidake was identified as Ceraceomyces tessulatus, a member of the family Amylocorticiaceae based on the molecular analysis of ITS region and D1/D2 regions of rDNA. Sequence similarity between the mushroom and Ceraceomyces tessulatus voucher KHL16429, Herb. O (ACCESSION KU518951) was 99% in ITS1 region and 99% in 26 or 28S rDNA D1/D2 regions respectively.