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Page number:74 
Remarks (internal):Hyphodontia cineracea is very similar to H. subaltacea except for the basidiospore size: basidiospores of the former species are 5-6 x 2-2.5 µm whereas those of the latter are 6-7 x 1.5-2 µm. 
Description type:Non-original description 
Description:Hyphodontia cineracea (Bourdot & Galzin) J. Eriksson & Hjortstam, Cort. N. Europe 6: 629, 1976. (Fig. 51)
? Peniophora glebulosa Bres. subsp. cineracea Bourd. & Galz., Bull. Soc. Mycol. France 28: 387, 1912.
Distribution: Europe and North America. New to Japan.
Basidiomata resupinate, adnate, effused, 50-100 µm thick; hymenial surface grayish white, pale yellowish white to cream, smooth, floccose, pilose under the lens (x 20); margin concolorous with the hymenial surface, thinning out, indeterminate. In vertical section, subhyaline, subpellicular to submembranous. Hyphal system monomitic; hyphae 2-5 µm in diam, smooth, thin- to thick-walled (up to I µm), nodose-septate, loosely intertwined in the subiculum; cystidia (hyphocystidia) numerous, cylindrical, 60-120 x 5.5-8.5 µm, with a basal clamp, smooth, thick-walled (up to 1.5 pm) except the apical part, projecting up to 80 µm beyond the hymenial surface; basidia subcylindrical, slightly constricted, 8-16 x 4-5 µm, with a basal clamp, producing 4 sterigmata; basidiospores cylindrical to suballantoid, 5-6 x 2-2.5 µm, smooth, thin-walled, non-amyloid.
 
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