Palomastigomycetes 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

Palomastigomycetes Tedersoo class. nov.

Type order.

Palomastigales Tedersoo .

Diagnosis.

Distinguishable from other fungi based on a diagnostic nucleotide signature in SSU V 8 (positions 1664–1678 in S. cerevisiae tttagtgaggactcg; one mismatch allowed). Forms a monophyletic, least inclusive clade in Neocallimastigomycota, covering sequences EUK 1124846 , EUK 1123686 , EUK 0320705 , and EUK 0320700 (Fig. 1 ).

Notes.

Recognized based on eDNA sequences only. Encoded as clade GS 38 Y in EUKARYOME v 1.9. Currently harbors Palomastigales (ord. nov.). Comprises potentially seven species. Detected in sediment (89.5 % out of 19 records) and soil (10.5 %) samples in boreal to tropical biomes in Eurasia and North America. Relative commonness in sediments suggests that members of this class are facultative anaerobes.

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.