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Page number:629 
Remarks (public):Widespread to the oak zone in Fennoscandia. Cosmopolitan species. Remarks. S. nivea is recognized but its pileus and the tiny pores and spores. 
Description type:Non-original description 
Description:Skeletocutis nivea (Jungh.) Jean Keller, Persoonia 10:353, 1979; Polyporus niveus Jungh., Verh. Batay. Genootsch. 17:48, 1839. -Polyporus semipileatus Peck, N.Y. State Mus. Ann. Rept. 34:43, 1881. Basidiocarps annual, effused-reflexed or often resupinate, rarely sessile, pilei solitary or imbricate, dimidiate to elongate, sometimes laterally fused, up to 3 cm wide; upper surface white to cream coloured, azonate, finely tomentose to glabrous; pore surface white to cream coloured, glancing, the pores circular to angular, 8-10 per mm, with thin, entire dissepiments; context white, azonate, up to 5 mm thick; tube layer white to pale buff, distinct from context, easily sectioned, up to 2 mm thick.
Hyphal system trimitic; contextual generative hyphae thin-walled, nodose-septate, with occasional branching, 2-3.5 µm in diam; contextual skeletal hyphae thick-walled, aseptate, with rare branching, 3-5 µm in diam; contextual binding hyphae developing from lateral branches on generative hyphae, thick-walled, much branched, nonseptate, 1.5-2 µm in diam; tramal hyphae generative, with clamps, 2-2.5 µm in diam, compactly arranged and difficult to separate.
Cystidia none; fusoid cystidioles rare and inconspicuous, 10-12 x 3-4 µm; hyphal pegs present, usually abundant.
Basidia clavate, 4-sterigmate, 10-14 x 3.5-5 µm, with a basal clamp.
Basidiospores allantoid, hyaline, smooth, negative in Melzer' s reagent, 4-5 x 0.5-1 µm. Type of rot. White rot of dead hardwoods.
Cultural characteristics. See Nobles 1948, 1958 and 1965; Bakshi et al. 1969; Stalpers 1978.
Sexuality. Heterothallic and tetrapolar (David 1982).
Substrata. Dead wood of numerous hard wood genera like Acer, Aesculus, Alnus, Betula, Castanea, Cornus, Corylus, Cratageus, Cytisus, Eucalyptus, Fagus, Fraxinus, Juglans, Malus, Ostrya, Pittosporium, Platanus, Populus, Prunus, Pyrus, Rhamnus, Robinia, Quercus, Salix, Sambucus, Sorbus, Tilia and Ulmus. A few times also collected on Picea.
 
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