Saccothecium sepincola (Fr.) Fr. [as ‘saepincola’], Summa veg. Scand., Sectio Post. (Stockholm): 398 (1849). Fig. 30
≡ Sphaeria sepincola Fr. [as‘saepincola’], Observ. mycol. (Havniae) 1: 181 (1815).
Index Fungorum number: IF 119497; MycoBank number: MB 119497; Facesoffungi number: FoF 00108.
Saprobic on twigs and branches of Rosa and Crataegus sp. Sexual state: Ascomata 105–135 μm high, 80−105μm wide (x̄ = 121 × 95 μm, n = 10), black, immersed to erumpent, solitary or scattered, globose to subglobose, usually uniloculate, rarely biloculate without a distinct ostiole. Peridium 14–36 μm (x̄ = 22 μm, n = 15) wide, a single layer, composed of brown to lightly pigmented cells of textura angularis, near the base connected to the host tissue. Hamathecium lacking pseudoparaphyses. Asci 38–64 × 11–16 μm (x̄ = 50 × 14 μm, n = 20), eight-spored, bitunicate, saccate to broadly clavate or cylindric-, with a short bifurcate pedicel and a distinct ocular chamber. Ascospores 14–20 × 4–6 μm (x̄ =16.9 × 5 μm, n = 25), overlapping biseriate, hyaline, 3-6-septate, sometimes 1 vertical septate, asymmetric, obovoid, fusiform to clavate, with broadly to narrowly rounded ends, with broad upper cells, smooth-walled. Asexual state: Unknown.
Material examined – Italy, Collinaccia – Castrocaro e Terra del Sole (province of Forlì- Cesena [FC]), on the twigs of Cornus sanguinea (Cornaceae), 3 March 2013, Erio Camporesi (MFLU 14-0276).
Figure 1 – Saccothecium sepincola (MFLU 14-0276). a Appearance of immersed ascostromata on the host surface. b, c Sections through ascostromata. d, e Bitunicate asci. f–h Ascospores. Scale bars: b, c = 50 μm, d, e = 25μm, f–h = 10 μm.