Palomastigomycetes Tedersoo class. nov.

Type order.

Palomastigales Tedersoo .

Diagnosis.

Distinguishable from other fungi based on a diagnostic nucleotide signature in SSU V 8 (positions 1664–1678 in S. cerevisiae tttagtgaggactcg; one mismatch allowed). Forms a monophyletic, least inclusive clade in Neocallimastigomycota, covering sequences EUK 1124846, EUK 1123686, EUK 0320705, and EUK 0320700 (Fig. 1).

Notes.

Recognized based on eDNA sequences only. Encoded as clade GS 38 Y in EUKARYOME v 1.9. Currently harbors Palomastigales (ord. nov.). Comprises potentially seven species. Detected in sediment (89.5 % out of 19 records) and soil (10.5 %) samples in boreal to tropical biomes in Eurasia and North America. Relative commonness in sediments suggests that members of this class are facultative anaerobes.