Basidiome subinvisible when dry, probably pruinose when fresh, about 60 µm thick. Hyphae hyaline, thin-walled, 1.5-3 µm wide, without clamps. Gloeocystidia clavate, 20-40 x 5.5-9.5 µm, amyloid, with pale yellowish contents, sulpho-positive. Cystidia hyaline, acuminate, 15-40 x 4-6.5 µm, tapering towards the top, rarely abruptly narrowed. Basidia hyaline, clavate to suburniform, sometimes stalked, 15-30 x 6-7.5 µm, amyloid, with 2-4 sterigmata. Spores hyaline, thin-walled, smooth, globose to subglobose, (5-)5.5-6.5 X (4.5-)5-6 µm, amyloid.

Macroscopically, the species appears close to Xenasma Donk or Tubulicrinis. However, pleurobasidia are absent and, although amyloid- basidia and hyphae do occur in Tubulicrinis, the absence of thick-walled, multi-rooted lyocystidia does not permit the inclusion of the species in Tubulicrinis. The presence of two kinds of cystidia and the smooth, globose spores might indicate a relationship to Vesiculomyces Hagstrõm, but there are some obvious differences (amyloid hyphae and basidia, sulpho-positive gloeocystidia, and very thin basidiome). The species causes a weak white rot and is tentatively placed in Gloeocystidiellum Donk rather than in a new monotypic genus.