Coprinopsis pseudoradiata (Kühner & Joss. & Watling) Redhead, Vilgalys & Moncalvo

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 : 8

7. Coprinopsis pseudoradiata (Kühner & Joss. & Watling) Redhead, Vilgalys & Moncalvo , Taxon 50(1): 230 (2001) ( Figure 4 , a–e)

Closed pileus initially ellipsoid to cylindrical-ellipsoid, later semi-ovoid, 4–6 × 3.5–4 mm, covered along its entire length by whitish veil fragments, pale gray, giving a tomentose texture. Expanded pileus conical to hemispherical, 10– 12 mm in diameter, soon becoming flattened, convex-flattened or nearly plano-convex, with a margin slightly revolute, initially whitish, becoming pale gray to dark gray with maturation, with abundant cord-like woven white veil, forming radial filaments from the center to the edge, hyaline to pale luteous, lightly pigmented in maturity, plicate-sulcate, with wavy and finally grooved edge. Lamellae free, initially white, becoming dark gray, deliquescent. Lamellulae present, similar in morphology. Stipe central, cylindrical, hollow, finely fibrillose, especially near the base, whitish, 35–45 mm long, 1–2.5 mm in diameter. Ring absent. Volva absent. Pileipellis composed of filamentous hyphal elements. Veil composed of filamentous elements in chains, with subglobose to wide-ellipsoid cells, usually inflated when persistent, constricted at each septum, with terminal cells undifferentiated, 60–150 × 10–22.5 μm. Cheilocystidia 30–50 × 22.5– 25 μm, globose to ellipsoid, thin-walled, smooth. Clamp connections present. Basidia 4-spored, interspersed with hyphidial elements. Basidiospores subglobose to ellipsoid, reddish-brown to black, 7.5–9.6 × 4.8–6 μm, smooth, with a central germ pore.

Material examined: — BRAZIL. Pernambuco, Instituto Agronômico de Pernambuco ( IPA), Serra Talhada , on goat dung, 21 Sep 2011, R.F. R. Melo ( URM86801 a, 86801b) ; on cattle dung, 25 Oct 2011, R.F. R. Melo ( URM86802 a!, 86802b!) .

Distribution: —Europe ( Finland, France, Netherlands, Norway, Ukraine) and North America ( United States of America). This is the first record from Brazil.

Notes: — Coprinopsis pseudoradiata is a representative with typical morphology of the former subsection Lanatuli J. Lange within sect. Coprinus Pers. , possessing a pileus covered by veil formed by inflated, elongated elements in chains, with constrictions at the septa and without differentiation of terminal cells. It differs from C. cinerea by the terminals cells, which have cell walls thicker, as well as wider and slightly longer basidiospores (8.4–10.8 × 6–7.2 μm). Macroscopically, it is easily confused with C. radiata , which has significantly larger basidiospores. In our specimens the basidiospore shape is not cylindrical as described by Uljé & Nooderloos (1999), and basidiospores are slightly broader (4.8–6 μm wide).

Figures

FIGURE 4. Coprinopsis pseudoradiata a. Habit of a basidioma on dung. b. Basidiomata. c. Filamentous elements of veil remnants. d. Cheilocystidia. e. Basidiospores. Coprinopsis stercorea f. Habit of a basidioma on dung. g. Basidiomata. h. Lamellae and stipe insertion. i. Globular elements of veil remnants, ornamented with nipple-shaped crystal projections. j. Cheilocystidia. k. Basidiospores. Scale bars: a, f=100 mm. b=7.5 mm. c, i=30 μm. d, k=5 μm. e=3 μm. g=2 mm. h=5 mm. j=10 μm. Figure: R.F.R. Melo.