Auriculariales » Auriculariales genera¬†incertae sedis » Stypellopsis

Stypellopsis hyperborea

Stypellopsis hyperborea Spirin & Malysheva 2018, in Spirin et al., Antonie van Leeuwenhoek, 112, 753-764 (2018).

Etymology: Hyperboreus (Lat., adj.)—northern

Diagnosis: Basidiocarps gelatinous, first appearing as conical or needle-like outgrowths 0.050.3 mm long, then fimbriate, partly fusing, semi translucent, whitish or with faint violaceous tints, later coalescent and producing reticulate compound basidiocarps 0.54 cm in diam. Hyphae clamped, thin-walled, 12.5 µm in diam., some brownish in KOH. Tramal cystidia tubular, tapering to somewhat moniliform or obtuse, some brownish in KOH, 60210 9 917.5 µm (n = 32/3); hymenial cystidia (gloeocystidia) clavate to tapering, some pleural, irregularly arranged, 1432 9 412 µm. Hyphidia occasionally branched, 0.52 µm in diam. Basidia (9.2–) 9.311.3 (–11.8) 9 (7.8–) 8.011.4 (–12.1) µm, sterigmata occasionally branched, 519 9 1.83 µm, enucleate stalk 730 9 23.5 µm. Basidiospores (4.8–) 5.17.0 (–7.1) × (4.0–) 4.15.9 (–6.2) µm (n = 200/7), L = 5.776.07, W = 4.895.21, Q = 1.141.19.

Index Fungorum Number: IF826895

Notes: Stypellopsis hyperborea possesses the largest basidiospores of the species complex. It seems to be a truly boreal species distributed in coniferous forests of North Europe.