Kohlm. & Volkm.-Kohlm., Can. J. Bot. 66(10): 2062 (1988)
Sordariomycetes, Subclass Hypocreomycetidae
Ophiodeira Kohlm. & Volkm.-Kohlm., Can. J. Bot. 66(10): 2062 (1988)
Ophiodeira monosemeia Kohlm. & Volkm.-Kohlm., Can. J. Bot. 66(10): 2062 (1988)
Index Fungorum number: Faceoffungi number:
Sexual morph: saprobic, ascomata 125-270 µm high, 210-320 µm long, ellipsoidal, immersed under a thin black stroma, ostiolate, with long necks, light brown, single or gregarious. Necks 60-300 µm long, 25-35 µm in diameter, more or less laterally inserted, curved, dark brown, ostiolar canal filled with short periphyses, piercing through the stroma. Peridium 15-20 µm thick, composed of 5-7 layers of polygonal flat cells with thick walls, forming a textura angularis, merging with the thin-walled pseudoparenchymatous cells. Pseudoparenchyma composed of thin-walled, large polygonal cells, filling the centrum of young ascomata, finally collapsing without forming catenophyses. Asci 45-65 × 15-18 µm, eight-spored, clavate, pedunculate, thin-walled, unitunicate, dissolving before the ascospore maturity, developing successively on an ascogenous tissue at the bottom of the locule, mostly arranged horizontally, parallel to the wood surface. Ascospores 15.8-20.7 × 5.9-7.7 µm, ellipsoidal, one-septate, not constricted at the septum, hyaline, with a single appendage. 1 µm thick, 7-11 µm long, cap-like, probably originating from an apical pore, attached to the apex and side of the ascospore, at first stiff and homogenous, in water becoming soft and banner-like, eventually transforming into a coil of delicate fibers that uncoil and form long, sticky filaments, remaining attached to the ascospore apices with their bases. Asexual morph: Undetermined (Description based on Kohlmeyer & Volkmann-Kohlmeyer (1988)).
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Image: Ophiodeira monosemeia. (a) Asomata under a thin stroma. (b) Ascospores with apical appendage. Scale bar: a=20 µm; b=5 µm.