 Amylostereaceae species were for a long time classified in the genus Stereum , based primary on the layered structure of the fruit body and the similar physiological activity . Mycologist Jacques Boidin separated <unk> from Stereum in 1958 , <unk> this decision by explaining that microscopic differences such as amyloid spores and encrusted cystidia were sufficiently distinct to warrant recognition as a new genus . Although the type species of the genus ( today called A. chailletii ) was initially named <unk> <unk> , the name <unk> had already been used for a genus in the flowering plant family <unk> . Boidin thus chose the genus name Amylostereum , referring to the amyloid spores . 
