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Page number:139 
Description type:Non-original description 
Description:Aleurodiscus thoenii (Boidin et al.) N˼˱ez & Ryvarden comb. nov. Fig. 66 Basionym: Acanthophysium thoenii Boidin et al., Bull. Soc. mycol. Fr. 101: 356, 1985.
Basidiocarp annual, resupinate, adnate, dull to finely pruinose, slightly tuberculate (lens), white to pale grey or beige.
Hyphal system monomitic, generative hyphae with clamps, 2-4 µm wide. Acanthophyses numerous, clavate to ventricose with long, partly branched protuberances in the upper part and with transitions to true dendrohyphidia. Gloeocystidia yellowish, slightly thick-walled, clavate to ventricose and usually mammillate, smooth, 35-50 x 7-20 µm. Dendrohyphidia with transitions to acanthophyses, up to 60 µm long. Basidia clavate, 30-65 x 7-10 µm with 4 sterigmata and a basal clamp. Basidiospores oblong ellipsoid to subcylindrical, smooth, 8-11 x 5-6 µm.
Cultural chracteristics. See Boidin et al (1985).
Substrata. Dead Cassia grainea and Bambusa.
Distribution. Known only from two localities in Zaire. Remarks. The species is close to A. cerussatus but separated by strongly branched acanthophyses and possibly by the hosts. All experiments in crossing A. thoenii with A. cerussatus from Europe failed.
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