Sedimentomastigomycetes 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

Sedimentomastigomycetes Tedersoo class. nov.

Type order.

Sedimentomastigales Tedersoo .

Diagnosis.

Distinguishable from other fungi based on a diagnostic nucleotide signature in SSU V 9 (positions 1672–1686 in S. cerevisiae ggcctccggattgat; no mismatch allowed). Forms a monophyletic, least inclusive clade in Neocallimastigomycota, covering sequences EUK 0319782 , EUK 0574067 , EUK 0574066 , EUK 1152060 , and EUK 1191154 (Fig. 1 ).

Notes.

Recognized based on eDNA sequences only. Encoded as clade GS 38 X in EUKARYOME v 1.9. Currently harbors Sedimentomastigales (ord. nov.). Comprises 5–6 potential species. Detected in sediments (50 % out of 10 records), freshwater (30 %), soil (10 %), and rotting algae (10 %) in tundra to tropical biomes in Eurasia, North America, and South America. The many records from sediments and flooded soils suggest 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.