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Page number:140 
Remarks (internal):This is an interesting species recognized by the pure white basidiome with slightly depressed pileus centre, adnate to short decurrent lamellae, lignicolous habit, basidiospore size and shape, and clavate cheilocystidia (Baroni & Lodge 1998, as Alboleptonia aripoana (Dennis) Pegler). Cheilocystidia in our collection are slightly shorter than those in the Trinidad type as revised by Baroni & Lodge (1998), who reported cystidia 46-110 µm long, but the other features agree with the original description. Baroni & Lodge (1998) suggest that A. aripoana sensu Pegler (1983) represents a distinct species, based on the number of spore facets (8-10 in Pegler's Antillean specimen versus 6-8 in E. aripoanum). Entoloma aripoanum is known from Trinidad (Dennis 1953, Horak 1977), possibly also from Martinique and Dominica (Pegler 1983; but see Baroni & Lodge 1998), and now is reported for the first time from Brazil. 
Description type:Non-original description 
Description:Entoloma aripoanum Dennis, Bull. Soc. Mycol. Fr. 69: 196. 1953. Fig. 2
Pileus ? 17 mm, plane-convex, with a central depression, surface white, glabrous, smooth; margin smooth, entire, slightly involute; context thin, fleshy, white, unchanging. Lamellae adnate to short decurrent, white, membranous, moderately crowded, with lamellulae. Stipe 36 x 3 mm, central, cylindrical, white, glabrous, smooth, with rhizomorphs, mycelium present at base. Odor strong, pleasant.
Basidiospores 10-11.5(-12.5) x 7-7.5 µm, x = 10.7 x 7.3 µm, Q = 1.30-1.50(- 1.66), Q x = 1.45, heterodiametric-elliptical, with 6-8 depressed facets, pink and moderately thick-walled. Basidia 32-42 x 10-11 µm, clavate, 2- or 4-spored. Pleurocystidia absent. Cheilocystidia 47-72 x 9-17 µm, cylindrical and some clavate, hyaline, thin walled. Pileitrama of exclusively hyphae similar to ones of lamella trama; vascular hyphae occasional, 5 µm wide. Pileipellis a cutis with erect hyphae 3.5-10 µm wide, hyaline. Lamella trama regular with hyphae ranging to 3.5-8.5 µm wide, apparently with yellowish brown granular cytoplasmatic contents. Clamp connections present.
Habitat: Solitary on rotten decayed wood in a tropical forest fragment.
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