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Page number:251 
Remarks (public):Cystosterum is characterized by the dimitic hyphal system and by the numerous vesicular gloeocystidia. It differs from Crustomyces mainly in the absence of dendrophyses. Both are molecularly classified in the Cystosteraceae (Larsson 2007b). 
Description type:Non-original description 
Description:Cystostereum Pouzar, ?eská Mykol. 13: 18, 1959.
Type species: Thelephora murrayi Berk. & M.A. Curtis [as 'murraii'], J. Linn. Soc., Bot. 10(46): 329, 1868.
Basidiome perennial, resupinate, effused, crustaceous, adnate, hymenophore tuberculate to odontioid, whitish, rhizomorphs or hyphal strands lacking. Hyphal system dimitic, generative hyphae with clamps, hyaline, richly branched, and thick-walled fibre-like skeletal hyphae. Gloeocystidia or gloeocystidioid vesicles numerous. Dendrohyphidia absent. Basidia clavate, with 4-sterigmata and a basal clamp. Basidiospores ellipsoid, thin-walled, smooth, hyaline, not amyloid.
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