Thryptospora singularis
Thryptospora singularis Petr. [as 'singularia'], Sydowia 1(1-3): 52 (1947).
Index Fungorum number: IF 291374; Facesoffungi number: FoF 12504, Fig. 1
Description:
Saprobic on woody and herbaceous substrates in terrestrial habitats. Sexual morph: Ascomata 270–350 µm high, 250–330 µm diam., superficial, subglobose to globose, scattered to crowded, ostiollate. Peridium 30–50 µm thick, composed of pale brown, small, thin-walled cells of textura angularis. Hamathecium 0.5–1.2 µm in diam., of filamentous, numerous, aseptate, branched, anastomosing trabeculate pseudoparaphyses. Asci 90–120 × 14–17 µm (x̄ = 92.5 × 15.2 µm, n = 10), 8-spored, fissitunicate, cylindrical to cylindric-clavate, with a short pedicel or sessile, rounded at the apex. Ascospores 7–16 × 3–5 µm (x̄ = 8.9 × 3.5 µm, n = 10), uni- to bi-seriate, fusiform, slightly tapered on the sides, hyaline to brown, 1- to multi-septate, without a gelatinous sheath. Asexual morph: Unknown.
Material examined: Syria, on dead stems of Phlomis brevilabris (Lamiaceae), 1980, Ove Eriksson (W11029, Type).
Fig. 1 Thryptospora singularis (W11029, Type). a Herbarium label and specimen. b Ascoma on substrate. c, d Vertical section through ascoma. e Peridium f Section through ascoma showing ostiole. g, h Pseudoparaphyses. i−l Asci. m. Tip of Asci stained in cotton blue. n−q Ascospores. Note: h, k, l, m, q: stained in cotton blue; j, n: stained in Melzer’s reagent. Scale bars: b, c = 500 µm, d = 20 µm, e, n−q = 10 µm, f−i, j−m = 50 µm.
Importance and distribution
Thryptospora comprises only one species known on dead stems of Phlomis brevilabris (Lamiaceae) in Asia (Syria).
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