Bolbitius demangei (Quél.) Sacc. & D. Sacc., Sylloge Fungorum

Melo, Roger Fagner Ribeiro, Chikowski, Renata Dos Santos, Miller, Andrew Nicholas & Maia, Leonor Costa, 2016, Coprophilous Agaricales (Agaricomycetes, Basidiomycota) from Brazil, Phytotaxa 266 (1), pp. 1-14 : 4-5

1. Bolbitius demangei (Quél.) Sacc. & D. Sacc., Sylloge Fungorum (Abellini) 17: 74 (1905)

( Figure 1 , a–c)

Expanded pileus campanulate to umbonate, finally becoming applanate, 36–40 mm in diameter, brown to pale brown, darkening with age, with a central papilla slightly brownish, with a smooth to squamulose surface and a slightly wavy to crenulated edge. Lamellae non-deliquescent, adnexed or free, closely spaced, thin, fragile, initially pale cream, finally reddish brown to cupreous with the maturation of basidia and basidiospores. Stipe central, cylindrical, slightly swollen at the base, hollow, finely striate, fibrillose, white to pale cream, 47–50 mm long, 2–2.5 mm in diameter, 2.5–3 mm at the base. Ring absent. Volva absent. Cheilocystidia 17.5–45 × 7.5–37.5 μm, lageniform to clavate, rarely slightly capitate, hyaline, thin-walled. Pleurocystidia absent or indistinguishable. Clamp connections absent. Basidia 2- to 4-spored, clavate. Basidiospores ellipsoid, except for the truncated base, smooth, dark yellow to golden, 12.5–15 × 7.5–10 μm, thick-walled, with a single germ pore.

Material examined: — BRAZIL. Pernambuco, Universidade Federal Rural de Pernambuco ( UFRPE), Recife, on cattle dung, 15 Mar 2013, R.F. R. Melo ( URM 86837a!, 86837b!).

Distribution: —Asia, Europe, North America and South America.This is the first record from Brazil.

Notes: — Bolbitius demangei resembles B. coprophilus (Peck) Hongo (1959) with a brown to reddish brown expanded pileus but differs by the smaller basidiomata (stipe up to 50 mm long) and darker lamellae at maturity ( Amandeep et al., 2013). A sequence of the partial LSU region obtained from this material (KX246930) had the best BLAST match with “ Bolbitius demangei AF 261520”.

Figures

FIGURE 1. Bolbitius demangei a. Habit of a basidioma on dung. b. Basidiomata. c. Basidiospores. Conocybe siliginea d. Habit of basidiomata on dung. e. Basidiomata. f. Capitate cystidia. g. Basidia. h. Basidiospores. Scale bars: a=20 mm. b=2.5 mm. c, f, h= 5 μm. d= 200 μm. e=2 mm. g=7.5 μm. Figure: R.F.R. Melo.