Viljandiaceae Tedersoo fam. nov.

Type genus.

Viljandia Tedersoo .

Diagnosis.

Distinguishable from other fungi based on diagnostic nucleotide signatures in SSU V 9 (positions 1695–1709 in S. cerevisiae gccagcaatggcagc; one mismatch allowed). Forms a monophyletic, least inclusive clade in Viljandiales, covering sequences EUK 1105441, EUK 1124341, EUK 1124345, and EUK 0524033 (Fig. 1).

Notes.

Recognized based on eDNA sequences only. Includes Viljandia (gen. nov.) and potentially another genus-level taxon represented by the sequence EUK 0524033 (forest soil in India).