Yatesula calami Syd. & P. Syd., Annls mycol. 15(3/4): 237 (1917), Figure 16
MycoBank number: MB 248195; Index Fungorum number: IF 248195; Facesoffungi number: FoF 10351;
Sapribic on leaves of Calamus sp. in terrestrial habitats. Mycelium lacking. Sexual morph: Ascomata 170–220 μm diam. (x̄ = 205 µm, n = 10), superficial, gregarious, or some solitary, slightly raised, circular, black, coriaceous. Wall of ascoma 18–25 μm wide, thick at the apex and thin at the base, single layer, comprising pigmented, thick-walled cells. Hamathecium lacking paraphyses. Asci 37–55 × 8–15 μm (x̄ = 45 × 9 µm, n = 10), mainly 8-spored, bitunicate, fissitunicate, dehiscence not observed, obclavate to cylindrical, with short pedicel, ocular chamber not observed. Ascospores 12–16 × 3–5 μm (x̄ = 14 × 4 µm, n = 10), overlapping 2–3-seriate, fusiform to clavate, hyaline, straight or curved, 1–4-septate, constricted at the septa, smooth-walled, with a gelatinous sheath. Asexual morph: Undetermined.
Material examined: Philippines, Province of Rizal, Luzon, on leaves of Calamus sp. (Arecaceae), September 1915, H. S. Yates (S F5690, holotype).
Figure 16 Yatesula calami (S-F5690, holotype). a, b Herbarium specimen. c, d Appearance of black ascomata on the host. e Squash mount of ascoma. f, g Section of ascomata. h Vertical section of peridium. i–m Asci with ascospores. n–q Ascospores. Scale bars: c = 500 µm, d = 200 µm, e = 50 µm, f–g = 20 µm, h, j–q = 5 µm, i = 10 µm.