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Page number:8 
Remarks (internal):The species is recognizable by the merulioid basidiome, tubular cystidia and small, somewhat allantoid spores. There is no record from subtropical or tropical areas, but known from Southern Australia (see Ginns, 1976). Byssomerulius rubicundus (Litsch.) Parmasto, originally described from Siberia, seems to be the same. 
Description type:Non-original description 
Description:Byssomerulius albostramineus (Torrend) Hjortstam, Windahlia 17:56, 1987,
Merulius albostramineus Torrend, Broteria, Bot. 11:70, 1913,
Meruliopsis albostraminea (Torrend) Jülich & Stalpers, Verh. Kon. Ned. Akad. Wet., Afd. Natuurk., Tweede Reeks 74:154, 1980,
Ceraceomerulius albostramineus (Torrend) Ginns, Can. J. Bot. 54 (1-2):107, 1976.
Specimen examined: Yamanashi, Pref., Mt. Fujii, Shoji-guchi, on Abies, 5.IX.1983, L. Ryvarden 211615.
Basidiome resupinate, hymenophore mainly distinctly merulioid, bright orange to reddish, usually paler when stored in the herbarium, margin whitish.
Hyphal system monomitic, subicular texture loosely arranged, hyphae thin to moderately thick-walled, generally 3-4(-6) µm wide, subhymenial hyphae short-celled, thin-walled and densely arranged, 3-4 µm wide, all hyphae without clamp connections (occasional clamps on the basal hyphae not observed in the specimen).
Cystidia thin-walled, tubular, hyaline, smooth or sometimes sparsely encrusted, 30-50(-60) µm long and 4-6 µm wide, apically normally widened.
Basidia narrowly clavate, 15-20(-25) x 4-5 µm, with four sterigmata and without a basal clamp connection.
Basidiospores curved and almost allantoid, often slightly bent at the basal part, thin-walled, about 4-5(5.5-6) x 1.5-2 µm, inamyloid, indextrinoid and acyanophilous.
Substrate. Coniferous wood.
Distribution. Circumpolar in the boreal conifer zone.
 
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