Tropicochytriaceae Tedersoo, 2025

Tedersoo, Leho, Hosseyni Moghadam, Mahdieh S., Panksep, Kristel, Prins, Victoria, Anslan, Sten, Mikryukov, Vladimir, Bahram, Mohammad, Abarenkov, Kessy, Kõljalg, Urmas, Esmaeilzadeh-Salestani, Keyvan, Pawłowska, Julia, Wurzbacher, Christian, Ding, Yi, Alkahtani, Saad Hussin & Nilsson, R. Henrik, 2025, Thirty novel fungal lineages: formal description based on environmental samples and DNA, MycoKeys 124, pp. 1-121 : 1-121

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).

Figures

Figure 1. Maximum Likelihood SSU- 5.8 S-LSU phylogram indicating placement of novel lineages in the fungal kingdom as highlighted in a coloured shade and red font. Previously described taxonomic clades are collapsed. All branches of Sumavosporidiomycetes and Gelotisporidiomycetes are shortened two-fold. Poorly supported branches with bootstrap values below 95 % / 99 % are indicated in blue. The original tree with bootstrap values and uncollapsed branches is indicated in Suppl. material 1.