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Page number:189 
Remarks (public):A merulioid hymenium is certainly no indication of a real natural relationship and seems to have developed several times in the evolution of the Basidiomycetes. However, it is difficult to find an acceptable arrangement where all the merulioid fungi can be placed in a natural connection with the smooth species. In the case of Byssomerulius corium, though, the problem does not seem to be too difficult. In several important characters it agrees with the genus Phanerochaete such as in nature of hyphae, shape of basidia and spores. For the other species referred to Byssomerulius by Parmasto the problems are worse. Merulius serpens is here referred to the new genus Ceraceomerulius which is related to Ceraceomyces (presence of clamps, rhizomorphs) and the same is done with Merulius rubicundus. This leaves Byssomerulius in Scandinavia with one species, viz. the genotype. 
Description type:Non-original description 
Description:Byssomerulius Parm. - Eesti NSV Tead. Akad. Toimet. Biol. 16: 383, 1967
Fruitbodies resupinate to pileate, hymenium first smooth, then merulioid, white, with age changing to yellowish or light brown, margin remaining white, subhymenium thickening with age, hyphal system monomitic, hyphae thinwalled or slightly thickwalled without clamps, basidia narrowly clavate, about 30-35 x 5-6 µm with normally 4 sterigmata, spores subcylindrical, smooth and non-amyloid.
Genotypus: Byssomerulius corium (Fr.) Parm.
Taxon name: