Tartumycetales 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

Tartumycetales Tedersoo ord. nov.

Type family.

Tartumycetaceae Tedersoo .

Diagnosis.

Distinguishable from other fungi based on diagnostic nucleotide signatures in ITS 2 (positions 120–129 in type species gaaccaaagg, one mismatch allowed) and LSU D 1 (positions 164–178 in type species and 161–175 in S. cerevisiae gatgcctgtgggagc, one mismatch allowed). Forms a monophyletic, least inclusive clade in Tartumycetes, covering sequences EUK 1186157 , EUK 1200073 , EUK 1186162 , EUK 1123648 , EUK 1138300 , OQ 702816, ON 754309, UDB 028835 , and HQ 191300 (Fig. 1 ).

Notes.

Recognized based on eDNA sequences only. Currently includes Tartumycetaceae and several potentially family-level groups represented by sequences EUK 1186157 (forest soil in Puerto Rico), EUK 1200073 (tundra soil in Finland), EUK 1186162 (rotting algal sample in Estonia), OQ 702816 (algal sample in MI, USA), ON 754309 (river sediment in China), UDB 028835 (lake water in Germany), and HQ 191300 (lake water in France).

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.