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Page number:297 
Remarks (public):Gloeocystidiellum was proposed by Donk (1931) for the misapplied Gloeocystidium P. Karst., afterwards emended to include monomitic species, with euhymenium, gloeocystidia and amyloid basidiospores (Donk 1956). The genus as above defined was regarded as heterogeneus, but useful for delimit a wide number of species. Eriksson & Ryvarden (1975) subdivided Gloeocystidiellum into seven groups on the basis of basidiome texture, hyphal septation, cyanophily of hyphae, sulfoaldehyde reaction of gloeocystidia, basidiospores shape and nature of the spore wall. At the present time Gloeocystidiellum s.l. and the seven groups proposed by Eriksson & Ryvarden l.c. are reorganized as follow: Boidinia (G. furfuraceum group), Conferticium (G. ochraceum group), Gloeocystidiellum (G. porosum group), Gloeopeniophorella (G. convolvens group), Gloiothele (G. lactescens group), Megalocystidium (G. luridum group), Vesiculomyces (G. citrinum group). In addition, Wu (1995, 1996) described other closely related genera: Amylofungus with amyloid hyphae, gloeocystidia, basidia and basidiospores; Dextrinocystidium with dextrinoid lamprocystidia (synonym of Gloeopeniophorella according to Hjortstam & Ryvarden 2007); and Gloeomyces, with a distinct dimitic hyphal system and with brownish binding hyphae. For further comments and keys to resupinate corticioids with gloeocystidia and amyloid basidiospores see Wu l.c. and Boidin et al. (1997). 
Description type:Non-original description 
Description:Basidiome resupinate, effuse, membranaceous or ceraceous, hymenophore smooth, rarely grandinioid or odontioid. Hyphal system monomitic, hyphae with clamps or simple-septate. Gloeocystidia present, usually SA+. Basidia clavate, with 4-sterigmata. Basidiospores suballantoid, ellipsoid, subglobose or globose, verrucose or aculeate (seemingly smooth in KOH), thin-walled, amyloid, acyanophilous.

 
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