Tomentellopsis echinospora

On the undersurface of decaying dead wood in contact with the ground, according to literature also on leaves or moss, with resupinate basidiomes, easily separable from the substrate, with a slightly granular to filamentous yellowish surface, and a whitish, diffuse growing margin.

Monomitic hyphal system, with subicular and subhymenial hyphae thin-walled, hyaline or with faint yellowish intracellular pigment, 4 to 6 µm wide, septate with simple septa (without clamp connections).

Without cystidia.

Basidia suburniform to utriform, 20 to 40 µm long, 7 to 9 µm wide, with simple base and two or four sterigmata (2- or 4-spored).

Spores globose to subglobose, moderately thick-walled, echinulate, pale yellow under the microscope, 6 to 7 µm long, 5.5 to 7 µm wide, ornamented with numerous spines 0.5 to 1 µm high, mostly containing a large oil droplet inside, inamyloid in Melzer's reagent.

Herbarium material available: JTP2292/24.