Cystidia 63.0-76.0 x 9.4-11.8 [micro]m, subcylindrical to cylindrical, sinuous, apically widened, thin-walled, with basal clamp; projecting up to 13.0 [micro]m out of the hymenium
. Basidia 20.0-32.0 x 6.2-7.6 [micro]m, clavate to subclavate, constricted, 4-sterigmate, with basal clamp; sterigmata up to 4.0 [micro]m long.
Hymenium: Gills, adnate, close, broad (moderately), pale yellow at first, becoming brown with age.
Hymenium: Gills, adnate to short decurrent (especially in older specimens), well separated, narrow; white initially, turning light brown, often spotted darker with age.
Acanthocytes present, abundant on rhizomorphs and scattered in the hymenium
It can be confused with the corticolous species, Haematomma subinnatum (Malme) Kalb & Staiger, distributed in the "Region del Cerrado" in South America, which has ascospores with 5 to 7 septa and a noninspersed hymenium
(Staiger & Kalb, 1995; Nelsen et al., 2006).
Hymenium thickening; basidia 23-28 X 6-7 [micro]m, clavate, clamped, yellowish and somewhat refringent under phase contrast; contents homogeneous or with minute granules or guttules, especially proximally; sterigmata 4, slender, more or less straight.
Hymenium thickened; basidia 50-57 X 8-11 [micro]m, clavate, clamped, thin- to thick-walled (wall up to 0.4 [micro]m thick), multiguttulate when young, less so by maturity; sterigmata four, up to 8 [micro]m long, subcomute.
Measurements of thalli, apothecia, hymenium
, asci and ascospores were made.