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Page number:51 
Description type:Non-original description 
Description:Aleurodiscus bisporus (Boidin & Lanq.) N˼˱ez & Ryvarden comb. nov. Fig. 13
Basionym: Acanthophysium bisporum Boidin & Lanq., Bull. Soc. mycol. Fr. 101: 362, 1985.
Basidiocarp corticioid, annual, first as small patches, later more effused, thin, smooth, buff to whitish grey, up to 120 µm thick.
Hyphal system monomitic, generative hyphae with simple septa, 2-3 µm wide, thin-walled and mixed with crystals especially in the subiculum. Acanthophyses hyphoid to ventricose and with only a few (3-12) protuberances in the apical part, 16-20 x 6-7.5 µm. Gloeocystidia ventricose to moniliform, thick-walled from the base towards a thin apex, yellowish to hyaline, 30-65 x 7-10 µm. Basidia clavate, 35-45 x 5-6 µm, with 2 sterigmata. Basidiospores ellipsoid, smooth, 6-10 x 4.5-5.5 µm.
Substrata. On branches of hardwood trees.
Distribution. Known only from the type locality in Guadeloupe (West Indies).
Remarks. The species is undoubtedly related to A. cerrusatus but is separated by the small and sparingly asperulate acanthophyses, the lack of clamps, and the bisterigmate basidia.
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