E-Flora BC: Electronic Atlas of the Flora of British Columbia

Summary:
Features include flat growth on fallen aspen with the pore surface exposed, large cream colored to tan pores, and abundantly clamped thin-walled hyphae. The online Species Fungorum, accessed January 16, 2005 and again August 29, 2020, listed this as a synonym of Radulodon aneirinus (Sommerf.) Spirin, on the latter date in Cerrenaceae. Justo(6) in 2017 said that Ceriporiopsis aneira falls within Irpicaceae even though the genus type (Ceriporiopsis gilvescens) and others including Ceriporiopsis pseudoplacenta fall within Meruliaceae. Justo(6) also place Radulon in their newly described family Cerrenaceae. A different name may therefore be appropriate. The description is derived from Gilbertson(1).

Ceriporiopsis aneirina has been found in BC, WA, OR, ID, AB, MB, ON, PQ, SK, NWT, YT, AK, AL, AZ, CA, CO, IA, LA, MI, MN, MT, NM, NV, NY, PA, SD, UT, WI, and WY, (Gilbertson).

Cap:
growing flat on wood with pore surface exposed, becoming widely spread out, tough, not easily separable, annual; sterile margin up to 0.2cm wide is whitish to pale tan and bald to slightly tomentose

Flesh:
up to 0.1cm thick, tough; whitish, not zoned

Pores:
1-3 per mm, angular; cream colored to tan; rough; walls entire, thin; tube layer up to 0.1cm thick, continuous with flesh and the same color

Microscopic:
spores 5-7(9) x 3.5-5 microns, broadly elliptic, smooth, inamyloid, colorless, distinctly apiculate; basidia 4-spored, 24-43 x 5-8 microns, clavate to spheropedunculate, with a basal clamp; cystidia none; hyphal system monomitic: subicular generative hyphae 2-5.5 microns wide, colorless in KOH, thin-walled, often branching, with abundant clamp connections, tramal hyphae similar

Spore Deposit:
white (Buczacki)