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Page number:84 
Remarks (public):Acanthophysellum was introduced for resupinate species with acanthohyphidia and smooth non-amyloid basidiospores with Corticium lividocoeruleum as the generic type species (Parmasto 1967). The statement about non-amyloid spores must be regarded as a typographical error because later Parmasto (1968) included Acanthophysellum in the tribe Aleurodisceae defined by the amyloid spores. Corticium lividocoeruleum and Thelephora frustulata Pers., the generic type of Xylobolus P. Karst, are closely related phylogenetically and morphologically (Larsson & Larsson 2003), and this connection could suggest that Acanthophysellum should be regarded as synonym of Xylobolus. However, Acanthophysellum differs from Xylobolus in some morphological features and in having white rot (white pocket rot in Xylobolus), phenoloxidase positive reaction and nuclear behavior astatocoenocytic (holocoenocytic in Xylobolus). Wu et al. (2000) and Boidin & Gilles (2001) treated Acanthophysium as synonym of Xylobolus but conserved Acanthophysellum. 
Description type:Non-original description 
Description:Basidiome resupinate, thin, adnate. Hyphal system monomitic, generative hyphae with clamps or with simple-septa. Gloeocystidia and acanthocystidia present. Basidia clavate to cylindrical, 2-4-sterigmata. Basidiospores smooth, thin-walled, cylindrical or ellipsoid to allantoid, amyloid.
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