Chthonolpidium Tedersoo gen. nov.

Type species.

Chthonolpidium enigmatum Tedersoo .

Diagnosis.

Distinguishable from other fungi based on diagnostic nucleotide signatures in ITS 2 (positions 60–74 gggccaagctggtta; one mismatch allowed) and LSU D 2 (positions 672–686 in type species and 604–618 in S. cerevisiae ttgcagttgggcgcc; one mismatch allowed). Forms a monophyletic, least inclusive clade in Chthonolpidiaceae, covering sequences EUK 1124876 and EUK 1138033 (Figs 1, 39).

Notes.

Recognized based on eDNA sequences only. Comprises potentially four species represented by sequences EUK 1124876 (mosses in Estonia), EUK 0534819 (tundra soil in AK, USA), and EUK 0534804 (grassland soil in Tibet).