Dermea cerasi (Pers.) Fr., Syst. orb. veg. 1: 115 (1825)
≡ Peziza cerasi Pers., Neues Mag. Bot. 1: 115 (1794)
= Foveostroma drupacearum (Lév.) DiCosmo, Can. J. Bot. 56(14): 1682 (1978)
Saprobic on the host plant. Sexual morph: Apothecia 1–3 mm diam., up to 1.5 mm high, erumpent, gregarious, separate or sometimes in small clusters, ± sessile or pedicellate, with a plane to undulate margin, at first yellowish brown and scurfy, eventually black and glabrous, leathery to horny in consistency, becoming more fleshy-leathery when moist. Hymenium at first concave, becoming plane or convex, roughened, sometimes cracked, occasionally slightly umbilicate, black, olivaceous to greenish when moist, margin at first thick, raised, furfuraceous, finally glabrous and disappearing, openings of the pycnidial cavities often appearing as yellowish wrinkles around the margin. Paraphyses 1.5–2 µm wide, hyaline, filiform, septate, unbranched, broadened at apex, narrowed at base, adhering to form a yellowish epithecium. Asci (75–)90–120(–150) × 10–13(–15) µm, 8-spored, cylindric-clavate, tapering below into a short stalk. Ascospores (12–)15–20(–25) × (4–)5–7.5 µm, hyaline to yellowish brown, irregularly biseriate, ellipsoidal-fusiform, straight or slightly curved, 0–4-septate (Groves 1946). Asexual morph: Conidiomata 1000–2000 µm diam., 300–650 µm high, yellowish to brown, solitary to gregarious, subperidermal in origin, immersed to partly erumpent at maturity, stromatic, subglobose to depressed globose, multilocular, thick-walled, glabrous. Ostiole short, centrally located. Conidiomata wall 40–189 µm wide, composed of thick-walled, hyaline cells of textura intricata to textura epidermodea. Conidiophores hyaline, cylindrical to subcylindrical, septate, broadened and branched at base, formed from inner cells of conidioma. Conidiogenous cells 11–25 µm long, 2–4 µm wide, hyaline, entoroblastic, phialidic, cylindrical to subcylindrical, discrete, determinate, with periclinal thickening in the collarette zone, smooth. Conidia 43–62 × 3–5 µm ( = 53.5 × 3.6 µm; n = 30), hyaline, elongate-fusiform to subfiliform, tapering towards both ends, curved or almost straight, aseptate or 1-septate, smooth, guttulate.
Culture characteristics: Colony on PDA reaching 30–40 mm diam., after 14 d at 25℃, white to pale grey, flattened, felt-like, with undulate to lobate margin, with dense, filamentous aerial mycelium on the surface, reverse pale brown.
Material examined: Italy, Province of Forlì-Cesena, Bagno di Romagna, near Riofreddo, on dead land branches of Prunus avium (Rosaceae), 25 April 2016, Erio Camporesi, IT2856B (MFLU 16-1286, reference specimen designated here), living culture MFLUCC 16-1147 = ICMP 21533 = KUMCC 16-0081, (KUN, HKAS 101646); ibid., Province of Forlì-Cesena, Campigna, on dead land branches of P. avium (Rosaceae), 22 Febrary 2016, Erio Camporesi, IT2856 (MFLU 16-0929), living culture MFLUCC 16-1148 = ICMP 21534 = KUMCC 16-0082.
Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.