Mytilinidiales » Mytilinidiaceae » Ostreola

Ostreola consociata

Ostreola consociata Darker, Can. J. Bot. 41: 1384 (1963).

            Index Fungorum number: IF 335453; Facesoffungi number: FoF 11449, Fig. 1


Saprobic on host. Sexual morph: Ascomata 200–325 μm diam., 200–325 μm high, hysterothecial, immersed or semi-immersed to superficial, gregarious, globose, navicular, having a horizontal longitudinal slit, coriaceous, black, smooth-walled, surrounded by a subiculum. Peridium 45−75 µm, two-layered, at the outside composed of irregular, thick walled, brown to black cells of textura angularis, the inner layer composed of smaller cells of textura globulosa. Hamathecium 1.5−3.0 µm, comprising long, branched or simple, septate, cellular pseudoparaphyses embedded in a gelatinous matrix. Asci 130−145 × 10−15 µm (x̄ = 140.9 × 12.3 µm, n = 10), 8-spored, bitunicate, fissitunicate, thick-walled, cylindrical to subclavate, with a short pedicel, apically rounded with an indistinct ocular chamber. Ascospores 19−21 × 7−8 µm (x̄ = 20.6 × 7.5 µm, n = 10), overlapping uniseriate or bi-seriate, ellipsoid to fusiform, hyaline when immature, dark brown to blackish-brown on maturity, 2–3 or multiseptate, constricted at the medium septum, septa darkened, ends rounded, smooth-walled. Asexual morph: Unknown.

 Material examined: The United States, Illinois, Vermilion, Kickapoo Park, on dead wood, 10 April 1976, JL Crane and JD Schoknecht (ILLS00169419).