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).

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)

Notes:
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).

Synonyms and Alternate Names:
Helvella friesiana Cooke
Helvella infula Schaeff.: Fr.
Polyporus aneirinus Sommerf.: Fr.
Poria aneirina (Sommerf.: Fr.) Cooke