Neophaeocryptopus cytisi Wanasinghe, Camporesi, E.B.G. Jones & K.D. Hyde, sp. nov.
Index Fungorum number: IF 551786, Facesoffungi number: FoF 01670, Fig. 1
Etymology: Named after the host genus on which it occurs, Cytisus.
Holotype: MFLU 15–3542
Saprobic on dead and hanging branches of Cytisus sp. Sexual morph Ascostromata 180 – 250 × 170 – 210 μm (x̄ = 212.8 × 187.1 μm, n = 10), superficial, semi-immersed to erumpent, solitary, scattered, broadly oblong, dark brown to black, coriaceous, uniloculate. Peridium 35 – 45 μm wide at the base, 30 – 40 μm wide at the sides, comprising 5 – 8 layers, outer part heavily pigmented, thick-walled, comprising a blackish to dark brown, amorphous layer, inner part composed of dark brown, thick-walled, angular cells, becoming flattened and hyaline inwardly. Hamathecium lacking pseudoparaphyses. Asci 70 – 90 × 20 – 30 μm (x̄ = 81.9 × 25.3 μm, n = 40), 8 – spored, bitunicate, fissitunicate, clavate to broadly-clavate, short pedicellate, thickened and rounded at apex, with an ocular chamber. Ascospores 25 – 35 × 7 – 10 μm (x̄ = 29.1 × 9.2 μm, n = 50), overlapping 1 – 2 – seriate, hyaline, broadly fusiform, rounded at both ends, 1-septate, with a median septum, constricted at the septum, smooth-walled, lacking a mucilaginous sheath. Asexual morph Conidiomata stromatic, immersed in agar to superficial, uni- to multi-loculate, globose to subglobose, glabrous, ostiole central, with minute papilla. Conidiomata walls composed of several layers of hyaline to dark brown, pseudoparenchymatous cells, organized in a texture angularis. Conidiophores arising from basal cavity of conidiomata, mostly reduced to conidiogenous cells. Conidiogenous cells holoblastic, phialidic, discrete, ampulliform to cylindric-clavate, hyaline, aseptate, smoothwalled. Conidia 25 – 35 × 6 – 9 μm (x̄ = 28.3 × 7.3 μm, n = 50), solitary, 1-celled, fusiform to falcate, with narrowed ends, initially hyaline, becoming pale brown at maturity, aseptate, smooth and thin-walled, guttulate, contents granular.
Material examined: ITALY, Arezzo Province: Croce di Pratomagno, dead and hanging branches of Cytisus scoparius (L.) Link (Fabaceae), 30 June 2014, E. Camporesi (MFLU 15–3542, holotype); ex-type culture, MFLUCC 14–0970, MUCL.
Fig. 1 Neophaeocryptopus cytisi (holotype) a Appearance of ascostromata on host substrate b, c Sections of the ascostromata d, e Asci f – i Ascospores j, k Conidiomata produced on PDA l, m, n Mature and immature conidia attached to conidiogenous cells g Mature and immature conidia. Scale bars: b, c = 50 μm, d, e = 20 μm, f – i, l = 10 μm, k = 500 μm, m, n = 20 μm.