Aquieurochytriomycetes Tedersoo & Esmaeilzadeh-Salestani

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

Aquieurochytriomycetes Tedersoo & Esmaeilzadeh-Salestani class. nov.

Type order.

Aquieurochytriales Tedersoo & Esmaeilzadeh-Salestani .

Diagnosis.

Distinguishable from other fungi based on a diagnostic nucleotide signature in LSU D 1 (positions 171–185 in type species and S. cerevisiae ggcaagccgggcaaa OR ggctgctcggacaaa; two mismatches allowed). Forms a monophyletic, least inclusive clade in Chytridiomycota, covering sequences EUK 1107407 , AB 971081, EUK 1100022 , EUK 1102113 , EUK 1123700 , and EUK 1102276 (Fig. 1 ).

Notes.

Recognized based on eDNA sequences only. Encoded as clade GS 59 in EUKARYOME v 1.9. Currently harbors Aquieurochytriales (ord. nov.) and potentially order-level groups represented by sequences EUK 1107407 (peatland soil in Sweden), EUK 0130469 ( woodland soil in Australia), EUK 0519470 (cropland soil in Estonia), and EUK 0569228 (freshwater sediment in Estonia). Comprises potentially 50–60 species. Detected in water (53.8 % out of the 80 records), sediments (32.5 %), and soil (13.7 %) in tundra to tropical biomes in all continents except Antarctica.

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.