Ophioceras
Ophioceras Sacc., Syll. fung. (Abellini) 2: 358 (1883)
Diaporthomycetidae, Magnaporthales, Ophioceraceae, Ophioceras
Index Fungorum number: IF3595; 23 morphological species; 11 species with sequence data.
Saprobic on wood and other plant material, commonly isolated in aquatic habitats. Sexual morph: Ascomata perithecial, solitary or in small groups, immersed or semi-immersed, dark brown to black, globose to subglobose, coriaceous, ostiolate. Ostiole a long neck, lined with periphyses. Paraphyses numerous, septate, tapering, hypha-like, thin-walled, filamentous, branched, intermingled among asci. Peridium thick, 3-layered, blackened. Asci 8-spored, unitunicate, subcylindrical to narrowly fusoid, apedicellate, with thimble-shaped, J-, apical ring. Ascospores fasciculate, hyaline, yellowish in mass, filiform, septate. Asexual morph: Undetermined (adapted from Maharachchikumbura et al. 2016).
Type species: Ophioceras dolichostomum (Berk. & M.A. Curtis) Sacc., Syll. fung. (Abellini) 2: 358 (1883)
Notes: Saccardo (1883) introduced Ophioceras based on O. dolichostomum. The genus is characterized by black ascomata with long necks, cylindrical asci with small, refractive apical rings and filiform ascospores (Teng 1934, Conway & Barr 1977, Shearer et al.1999, Tsui et al. 2001, Thongkantha et al. 2009, Klaubauf et al. 2014). Ophioceras species are commonly encountered on decaying woody substrates in freshwater habitats all over the world (Hyde 1992, Hyde & Goh 1998, Shearer et al. 1999, Tsui et al. 2001, Thongkantha et al. 2009, Hu et al. 2012).
Species illustrated in this entry:
Ophioceras commune Shearer, J.L. Crane & W. Chen
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