Sedimentomastix 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

Sedimentomastix Tedersoo gen. nov.

Type species.

Sedimentomastix tueriensis Tedersoo .

Diagnosis.

Distinguishable from other fungi based on diagnostic nucleotide signatures in SSU V 9 (positions 1672–1686 in S. cerevisiae ggcctccggattgat; no mismatch allowed) and LSU D 2 (positions 524–538 in the type species and 460–474 in S. cerevisiae ttggtattttgggtg; two mismatches allowed). Forms a monophyletic, least inclusive clade in Sedimentomastigaceae, covering sequences EUK 0319782 , EUK 0574067 , EUK 0574066 , EUK 1152060 , and EUK 1191154 (Figs 1 , 25 ).

Notes.

Recognized based on eDNA sequences only. Comprises 5–6 potential species represented by sequences EUK 1191154 (rotting algae in Estonia), EUK 0319721 (river sediment in Germany), EUK 0319782 (lake sediment in Estonia), EUK 0574066 (lake sediment in Tibet), and EUK 0574067 (river sediment in Brazil).

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.

Figure 25. Maximum Likelihood SSU- ITS - LSU phylogram indicating the position of Sedimentomastix tueriensis within Sedimentomastigomycetes, with ultra-rapid bootstrap values indicated (for higher-level classifications only). Other genus-level groups are collapsed. Neocallimastigomycota spp. were used as an outgroup.