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Page number:161 
Description type:Non-original description 
Description:Meruliopsis corium (Fr. : Fr.) Ginns, Canad. J. Bot. 54:126. 1976.
Basionym: Thelephora corium Fr., Syst. mycol. 1:449. 1821.
= Merulius corium (Fr. : Fr.) Fr., Elench. fung. 1:58. 1828.
Basidiomata annual; effuso-reflexed, seldom wholly resupinate or sessile; coriaceous to coriaceous-ceraceous; confluent, imbricate on vertical substrata. Reflexed part umbonate; sometimes laterally confluent. Upper surface tomentose to hirsute; zonate or not; white to pale yellow brown. Hymenial surface even when young, becoming shallowly pitted (merulioid); cream-colored to yellowish orange. Hyphal system monomitic. Hyphae mostly without clamps, some septa with single or multiple clamps. Basidia subcylindrical to subclavate; 4-sterigmate; basal clamp absent; 20-40 x 5-6 µm. Basidiospores ellipsoid to cylindrical; hyaline; smooth; thin-walled; negative in Melzer's; (4-) 5 8 x 2-3.5 µm.
Distribution: Widespread.

Discussion: This species can be confused with Stereum ochraceo-flavum or young Chondrostereum purpureum at first sight. Although M. corium often has an even hymenial surface when young, examination of older, adjacent basidiomata usually reveals that the hymenium is actually pitted.

Descriptions and illustrations: Burt, 1917; Eriksson & Ryvarden, 1973; Ginns, 1976; Jahn, 1971; Jülich, 1984; Jülich & Stalpers, 1980; Lindsey & Gilbertson, 1978; Telleria, 1980; Teng, 1939.

Resupinate and/or decidedly merulioid species:
The following species are distinctly merulioid, some of which are wholly resupinate (see Ginns, 1976): M. albostramineus (Torrend) Jülich & Stalpers, M. ambiguus (Berkeley) Ginns, M. hirtellus (Burt) Ginns, and M. taxicola (Pers. : Fr.) Bondartseva in Parmasto.
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