Coprinus foetidellus P.D. Orton

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 : 10-11

10. Coprinus foetidellus P.D. Orton , Notes Royal Bot. Gdn Edinb. 32(1): 139 (1972)

( Figure 5 , f–k)

Closed pileus subglobose to ellipsoid, 4–5 × 3–4 μm, whitish to pale gray, abundantly covered along its entire length by farinaceous to fibrillose veil fragments, giving it a tomentose aspect. Expanded pileus initially ellipsoid to cylindrical-ellipsoid, later campanulate and finally flattened, 8–11 mm in diameter, whitish to light gray, with wavy to slightly sulcate margin. Lamellae free, initially white, becoming dark gray to black, ca. 1 mm thick, deliquescent. Lamellulae present, similar in morphology. Stipe central, cylindrical to slightly clavate near the base, hollow, finely fibrillose, whitish to pale gray, 30–40 mm long, 0.5 mm in diameter. Ring absent. Volva absent. Pileipellis hyphal. Veil composed of globular elements, hyaline, thin-walled, with up to 65 μm in diameter, adorned by nipple-shaped crystal projections. Cheilocystidia 22.5–37.5 × 15–22.5 μm, subglobose, saccate to clavate, usually collapsing, hyaline, thin-walled, smooth. Pleurocystidia large, up to 75 μm in length, subglobose, subellipsoid to obpyriform, hyaline, thin-walled, smooth. Clamp connections absent or not observed. Basidia 4-spored, usually interspersed with hyphidial elements. Basidiospores ovoid to oblong in frontal view, ellipsoid to cylindrical in side view, reddish-brown to dark brown, 7.5–10.5 × 5–7.5 μm, thick-walled, with rounded ends and a central germ pore.

Material examined: — BRAZIL. Pernambuco, Instituto Agronômico de Pernambuco ( IPA), Serra Talhada, on cattle dung, 13 Sep 2011, R.F. R. Melo ( URM 86790!).

Distribution: —Europe ( Netherlands, Ukraine). This is the first record from Brazil.

Notes: —This species was recorded on a few samples of herbivore dung in the semiarid region of Pernambuco, Coprinus foetidellus possesses a strong narcotic odor (which accounts for its specific epithet) and veil remnants formed by large globular cells adorned by nipple-shaped crystals. It resembles Coprinopsis stercorea , differing by the tomentose aspect of the pileus and by the wider basidiospores (7.5–10.5 × 5–7.5 μm).

Figures

FIGURE 5. Coprinopsis vermiculifer a. Habit of basidiomata on dung. b. Basidiomata. c. Filamentous elements of veil remnants. d. Cheilocystidia. e. Basidiospores. C. foetidellus f. Habit of basidiomata on dung. g. Basidiomata. h. Lamellae and lamellulae, showing the stipe insertion.i.Globular elements of veilremnants,ornamented with nipple-shapedcrystal projections.j. Cheilocystidia.k. Basidiospores. Scale bars: a, f=100 mm. b=2.5 mm. c=10 μm. d, j=7.5 μm. e, k=5 μm. g=2 mm. h=5 mm. i=25 μm. Figure: R.F.R. Melo.