Tibetochytriales Tedersoo ord. nov.

Type family.

Tibetochytriaceae Tedersoo .

Diagnosis.

Distinguishable from other fungi based on diagnostic nucleotide signatures in SSU V 4 (positions 722–736 in S. cerevisiae gtgggttagggatcc or gtgggttagggagct; one mismatch allowed), 5.8S (positions 120–134 in type species and S. cerevisiae gctggtattccggcg or tttggtatcccgaag; one mismatch allowed), and LSU D 2 (positions 505–619 in type species and 600–614 in S. cerevisiae ggcttagctggatac or agcttttgcagggat; one mismatch allowed). Forms a monophyletic, least inclusive clade in Tibetochytriomycetes, covering sequences EUK 1186747, EUK 1123755, EUK 1186750, EUK 1102822, and EUK 1186746 (Fig. 1).

Notes.

Recognized based on eDNA sequences only. Currently includes Tibetochytriaceae (fam. nov.) and another potentially family-level group represented by sequences EUK 1102822 and EUK 1186746 (both forest soil in Puerto Rico).