Comprehensive Description

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General Description

 Anamorph. Effuse, grey to blackish-brown, velvety, with pale dark brown, smooth, septate hyphae and erect, straight, cylindrical, black stromata formed in culture on rice grains. Conidiophores. Single, flexuous, geniculate, septate, smooth, cylindrical, reddish-brown, up to 150μm long, 3-7 μm wide. Conidiogenous cells. Polytretic, integrated, terminal and intercalary, sympodial, cicatrized, bearing verruculose conidiogenous nodes. Conidia. Straight, ellipsoidal or oblong, rounded at the ends, pale brown to mid reddish-brown, usually 3- rarely 4- or 5-distoseptate, 14-40 × 6-11 μm. Ascomata. Globose to subglobose, black, superficial on a columnar to flat stroma adhering to the rice straw, 375-940 μm diam., with a long cylindrical ostiolar beak 250-1250 × 90-125 μm. Asci. Cylindrical to long clavate, vestigial bitunicate, 1- to 8-spored, with spores arranged parallel to partly or closely coiled in a helix, short pedicellate, 100-182 × 8.5-15 μm. Ascospores. Filiform, somewhat tapering towards the ends or flagelliform at the ends, colourless to very pale, 3- to 13-septate, 81-206 × 2.5-5.5 μm. Pseudoparaphyses. Filamentous, colourless, septate, branched. 


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© Ahmed Abdel-Azeem

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