Otidea macrospora M. Zeng, Q. Zhao & K.D. Hyde, sp. nov. FIGURE 15

MycoBank number: MB; Index Fungorum number: IF; Facesoffungi number: FoF 12600;

Saprobic on soil. Sexual morph: Apothecia 0.8−3.5 cm broad, 2−4 cm high, scattered to gregarious, ear-shaped or cupulate, split, substipitate, basal with white to cream tomentum and mycelium. Receptacle surface yellow, margin mostly split on one side, rarely entire. Hymenium ocher, daker in color than receptacle surface, nearly smooth. Ectal excipulum 120−200 µm, composed of textura angularis to textura globulosa, 23−32 × 18−24 μm cells, yellow to brownish, with swollen hypha-like hairs, 5−9 μm. Medullary excipulum 150−300 μm, composed of textura intricata, 6−9 µm broad, hyaline to yellowish hyphae. Paraphyses 3−4 µm broad, with yellow pigmented, filiform, mostly curved at the apex, exceeding the asci, with 1−4 district notches close to apex. Asci 235−270 × 13−15 μm, 8-spored, cylindrical, operculate, inamyloid. Ascospores [20/1/1, in H2O] (16.2−) 17.5−20.2 (−21.0) × (8.1−) 9.6−12.2 (−13.3) μm (Q = 1.60−2.01, Q = 1.74±0.11), ellipsoid to broadly ellipsoid, hyaline, uniseriate, equilateral, rounded at the ends, uniguttulate to biguttulate, smooth. Asexual morph: Unknown.

FIGURE 15. Otidea macrospora. a, b Typic mature specimens. c Vertical section of ascomata. d Ectal excipulum. e Asci and paraphyses. f, g Apexes of paraphyses. h, i Asci. j Apex of ascus. k–m Ascospores. Scale bars: c = 200 μm d, e, h, i = 100 μm. f, g = 20 μm. j–m = 10 μm.