Gelotisporidiomycetes Tedersoo

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

Gelotisporidiomycetes Tedersoo class. nov.

Type order.

Gelotisporidiales Tedersoo .

Diagnosis.

Distinguishable from other fungi based on diagnostic nucleotide signatures in SSU V 8 (positions 1541–1550 in S. cerevisiae ggatcagtca; no mismatch allowed) and LSU D 1 (positions 302–311 in type species and 305–314 in S. cerevisiae cgcgccatct; one mismatch allowed). Forms a monophyletic, least inclusive clade in Rozellomycota, covering sequences EUK 1138731 , EUK 1138718 , EUK 1138568 , EUK 1138757 , EUK 1100925 , EUK 1105586 , EUK 1105726 , EUK 1105789 , EUK 1101184 , EUK 1202629 , EUK 1201985 , EUK 1104844 , and EUK 1123671 (Fig. 1 ).

Notes.

Recognized based on eDNA sequences only. Encoded as clade GS 15 in EUKARYOME v 1.9. Previously considered a lineage with phylogenetic affinities to Blastocladiomycota, but inclusive taxon sampling in Blastocladiomycota and Rozellomycota places Gelotisporidiomycetes in Rozellomycota. Currently harbors Gelotisporidiales (ord. nov.). Comprises potentially 90–110 species. Detected in soil (96.7 % out of 335 records) and freshwater (2.7 %). Two samples were identified from myxomycete colonies, suggesting that this group may include protist parasites. Recorded from tundra to hot tropical biomes across 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.