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Page number:21 
Remarks (internal): The genus Athelia is characterized by its thin and pellicular (athelioid) basidiomata that are easily separable from their substrates and microscopically by the loosely intertwined subicular hyphae, the clavate basidia and the non-amyloid basidiospores. Jülich (1972) recognized 21 species in the genus. Subsequently. Hjortstam (1987) reported 25 species as the members of Athelia. Recently, A. repetobasidifera Maekawa was added to the genus (Maekawa. 1993). From Japan, A. laxa [as Hyphodontia laxa (Burt) Hayashi (Hayashi. 1974)], A. repetobasidifera and A. rolfsii (Curzi) Tu & Kimbrough (Tu and Kimbrough. 1978) [as Corticium centrifugus (Lév.) Bres. (= Hypochnus centrifugus Tul.) (Ito, 1955)] have been reported. I examined the two Japanese specimens (F-210913 and F-210915. TNS) labelled as "H. centrifugus" but could not confirm their disposition because of poor conditions. Therefore. I exclude A. rolfsii for the time being from the present list of Japanese corticiaceous fungi. and described A. laxa and six other species. 
Description type:Non-original description 
Description:ATHELIA Persoon emend. Donk, Mycol. Eur. 1: 84, 1822; Fungus 27: 12, 1957. Type species: Athelia epiphylla Pers.
Basidiomata resupinate. effused. loosely adnate. easily separable. thin. athelioid: hymenial surface white to grayish or pale yellowish white. smooth. In section subhyaline. pellicular. Hyphal system monomitic: hyphae usually thin-walled, smooth. clampless- or nodose-septate; cystidia present or lacking: basidia short-clavate, producing 2-4 sterigmata: basidiospores variously shaped. smooth, thin-walled. non-amyloid.
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