Mytilinidion didymospora Jayasiri, Camporesi & K.D. Hyde, Mycosphere 9 (4): 824 (2018). Fig. 41
MycoBank number: MB 554457; Index Fungorum number: IF 554457; Facesoffungi number: FoF 04584;
Saprobic on dead cones of Cupressus glabra (Cupressaceae). Sexual morph: Hysterothecia 455–835 μm long × 108–132 μm wide × 110–155 μm high (x̅ = 670 × 125 × 132 μm, n = 10), navicular, flexuous, superficial on host tissue, scattered or appear as a group, with a longitudinal slit, surface black and shiny. Peridium 15–22 μmwide (x̅ = 18 μm), carbonaceous, narrow, thickening equally, composed of cells of textura angularis. Hamathecium comprising 1–1.5 μm wide, persistent, septate, hyaline, branched, shorter than the asci. Asci 75–95 × 4–7 μm (x̅ = 84 × 5 μm, n = 20), 8-spored, bitunicate, cylindrical to clavate, with short, narrow pedicel. Ascospores 14– 19 × 2–4 μm (x̅ = 15 × 3 μm, n = 20), 1–2-seriate, asymmetric, cylindrical, one end tapering and another end rounded, hyaline to pale brown, 1-septate, not constricted at the septa, guttules present, mucilaginous sheath absent, smooth-walled. Asexual morph: Undetermined.
Culture characteristics – Colonies on MEA attaining 12–15 mm diam. after 7 days at 25 °C, with irregular pale brown edge, brown, with dense aerial mycelium on the surface with brown, reverse similar.
Material examined – Italy, Forlì-Cesena [FC], Province, Montebello – Modigliana, on dead land cones of Cupressus glabra (Cupressaceae), 6 October 2015, Erio Camporesi, IT 2629 (HKAS96319, isotype), living cultures MFUCC16-0619.
Figure 41 – Mytilinidion didymospora (HKAS96319, isotype). a View of hysterothecia on host surface. b Section through hysterothecium. c Peridium. d, e Asci. f–i Ascospores. Scale bars: a = 500 µm, b = 200 µm, c = 10 µm, d, e = 20 µm, f–i = 5 µm.