Ruderaliomycetes Tedersoo class. nov.

Type order.

Ruderaliales Tedersoo .

Diagnosis.

Distinguishable from other fungi based on a diagnostic nucleotide signature in LSU D 2 (positions 631–640 in the type species and 564–573 in S. cerevisiae acggatacgg; one mismatch allowed). Forms a monophyletic, least inclusive clade in Mortierellomycota, covering sequences EUK 1138161, EUK 1137899, EUK 1124460, EUK 0531800, EUK 1103744, EUK 1103025, EUK 1103555, EUK 1103599, EUK 1203462, and EUK 1700231 (Fig. 1).

Notes.

Recognized based on eDNA sequences only. Encoded as clade GS 49 in EUKARYOME v 1.9. Currently harbors the single order Ruderaliales (ord. nov.). Comprises potentially 40–50 species. Detected in soil (98.5 % out of the 329 records) and sediments (1.5 %) in cold temperate to hot tropical biomes across all continents except Antarctica.