Tropicochytriaceae Tedersoo fam. nov.

Type genus.

Tropicochytrium Tedersoo .

Diagnosis.

Distinguishable from other fungi based on diagnostic nucleotide signatures in SSU V 4 (positions 841–850 in S. cerevisiae tccgggracc; no mismatch allowed) and LSU D 2 (positions 598–607 in the type species and 592–601 in S. cerevisiae agcagcgctg; one mismatch allowed). Forms a monophyletic, least inclusive clade in Tropicochytriales, covering sequences EUK 1102342, EUK 1186762, EUK 1100009, EUK 1186758, EUK 0519487, EUK 1186756, and EUK 1102527 (Fig. 1).

Notes.

Recognized based on eDNA sequences only. Includes Tropicochytrium (gen. nov.) and other potentially genus-level groups represented by sequences EUK 1102342, EUK 1186762, EUK 1102527, and EUK 1100009 (all forest soil in Puerto Rico).