Maerjamyces Tedersoo & Esmaeilzadeh-Salestani, 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

Maerjamyces Tedersoo & Esmaeilzadeh-Salestani gen. nov.

Type species.

Maerjamyces jumpponenii Tedersoo & Esmaeilzadeh-Salestani .

Diagnosis.

Distinguishable from other fungi based on diagnostic nucleotide signatures in 5.8S (positions 77–86 in type species and 78–87 in S. cerevisiae agagtacgtg; one mismatch allowed). Forms a monophyletic, least inclusive clade in Maerjamycetaceae, covering sequences EUK 1138158 , EUK 0484301 , and EUK 0484311 (Figs 1 , 33 ).

Notes.

Recognized based on eDNA sequences only. Comprises potentially three species, represented by sequences EUK 0484301 (tundra soil in Svalbard) and EUK 0484311 (forest soil in OR, USA).

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 33. Maximum Likelihood SSU- ITS - LSU phylogram indicating the position of Maerjamyces jumpponenii within Maerjamycetes, with ultra-rapid bootstrap values indicated. Other genus-level groups are collapsed. Mortierellomycota spp. were used as an outgroup.