Ascocarp Morphology. Ascocarp subglobose or globose or lobed, orifice or cavity absent (often with a basal depression), 0.5-5 cm in diameter, black (blackish-brown, purplish-black), with warts, warts flat (sometimes) or angulated, color of spore-bearing tissue grey or black (purplish-black), veins large and rare. Peridium 100-150 micron, outermost layers 70-100 micron, red-brown, anatomical structure pseudoparenchymatic with angular cells or pseudoparenchimatic with roundish cells, innermost layers 30-50 micron, color hyaline or yellow-brown, anatomical structure plectenchymatic, external cystidia absent.
Asci ans spores Morphology. Asci globose, major axis 70-96 micron, minor axis 60-75 micron, number of spores per ascus 2-5, irregularly clustered.
Spores ellipsoid, major axis 26-31 micrometer lenght, minor axis 18-23 micrometer lenght, color yellow or pale brown, spines; ornamentation length 3-4 micron.
Distribution. Habitat temperate; Putative plant host Quercus, or Corylus, or Tilia.
DNA polymorphism. ITS restriction pattern with EcoRI 300-350 bp, or 550-600 bp; SphI 900-950 bp; HincII 50-100 bp, or 300-350 bp, or 500-550 bp; DNA sequence ID of the ITS1-5.8S-ITS2 regions AF001010.
Mycorrhizae morphology. Mycorrhizae emanting hyphae absent, or rare; anatomy of emanating hyphae: clamps absent; color of emanating hyphae hyaline; color of very tip whitish, or ochre, yellowish brown; color of older parts ochre, yellowish brown, or brown; cystidia absent, or present; needle like; color pale yellow; intercalate swelling absent; ramification absent; anatomy of the mantle pseudoparenchymatus with epidermoid hyphal cells" like a puzzle".