Search on : Taxa descriptions


 Add this item to the list   550895 Original description
Description type:Original description 
Description:Saprobic on dead herbaceous branches. Sexual morph Ascomata 350–450 μm high × 250–400 μm diam. (x = 395.3 × 323.7 μm, n = 10), solitary, scattered, immersed to erumpent, globose or subglobose, coriaceous, wall black, with or without papilla, ostiolate. Ostiole 150–200 μm high, 90–130 μm diam. (x = 174.3 × 109 μm, n = 10), blackish-brown, smooth, ostiolar canal filled with hyaline cells. Peridium 15–30μm wide at the base, 25–50μm wide at the sides, thick, 1-layered, composed of small heavily pigmented thick-walled cells of textura angularis. Hamathecium comprising numerous, 1.9 μm (n = 30) wide, filamentous, branched septate, pseudoparaphyses. Asci 110–130 × 10–16 μm (x = 119.6 × 13.9 μm, n = 40), 8- spored, bitunicate, fissitunicate, clavate, with a long, narrow, furcate pedicel, up to 30–35 μm long, with a minute ocular chamber. Ascospores 19–22 × 5.5–9 μm (x = 20.2 × 7.6 μm, n = 50), overlapping 1–2-seriate, narrowly ovoid to clavate, 3- distoseptate, constricted at the septa, initially hyaline, becoming yellowish-brown at maturity, narrowly rounded at both ends, smooth-walled, not surrounded by a mucilaginous sheath. Asexual morph Conidiomata 300–550 μm diam., 200–250μm high, superficial or immersed in the agar, dark brown to black, clothed with white hyphal projections, simple cavities. Conidiomatal wall composed of a 40–50μm wide outer layer and 10–20μm wide inner layer of cells of textura angularis. Conidiogenous cells 5–8 × 2–4 μm discrete, assembled into protruding masses, or integrated in very compact conidiophores. Conidia 2.5–4 × 1.5–2.5 μm (x = 3.2 × 1.9 μm, n = 20) narrowly ellipsoidal or short-cylindrical, straight or slightly curved, rounded at both ends, one-celled, with one or two small, polar guttules, initially hyaline, becoming light brown, smooth-walled.
Culture characters: Colonies on PDA reaching a diam. of 30–35 mm in 21 d, flat, with undulate to lobate margin, hyaline, covered by thin, felty, white, aerial mycelium, honey- yellow in reverse, sporulation after 8 weeks.
Taxon name: