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Page number:126 
Remarks (public):Amyloxenasma was segregated from Phlebiella as independent genus by Hjortstam & Ryvarden (2005) ranking to generic level the subgenus Amyloxenasma Oberw. It includes species with pleurobasidia and smooth amyloid basidiospores. The phylogenetic position of Amyloxenasma is unclear, but it could belong to the Amylocorticiaceae because the amyloid spore wall is indicative of this group, but it differs from other genera included in this family in the morphology of the basidia, typically pleurobasidiate (Larsson 2007b). 
Description type:Non-original description 
Description:Amyloxenasma (Oberw.) Hjortstam & Ryvarden, Syn. Fung. (Oslo) 20: 34, 2005.
Bas.: Xenasmatella subg. Amyloxenasma Oberw., Sydowia, Ann. Mycol. Ser. II, 19: 35, 1965.
Type species: Corticium grisellum Bourdot, Rev. Sci. Bourb. Centr. Fr. 35:17, 1922.
Basidiome resupinate effused, thin to moderately thick, hard when dry, smooth to more or less tuberculate, greyish often with a bluish tint. Hyphal system monomitic, hyphae with clamps, more or less gelatinized and often with irregular ampullate septa. Cystidia absent. Basidia usually short, pleural, with 4-sterigmata, and a basal clamp. Basidiospores allantoid to reniform, smooth, thin-walled and amyloid.
 
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