Ocellisimilis clavata L.L. Liu, J. Yang & Z.Y. Liu, sp. nov.
MycoBank number: MB 559456; Index Fungorum number: IF 559456; Facesoffungi number: FoF 12790;
Etymology: referring to the clavate ascospores.
Holotype: GZAAS 20-0393
Saprobic on submerged decaying wood in freshwater habitats. Asexual morph: Undetermined. Sexual morph: Ascomata scattered or gregarious, immersed, perithecial, 140–195 × 178–220 μm, subglobose to conical, dark brown to black, ostiolate, slit-like on host surface. Ascomatal wall coriaceous, 15.5–35 μm thick, composed of thick-walled, dark brown cells of textura angularis in the outer layer, becoming pale brown to hyaline cells of textura angularis towards inner layers. Pseudoparaphyses 2–3 μm wide, numerous, cellular, hyaline, branched, septate, embedded in a matrix. Asci 82–137 × 21–30.5 μm ( = 113 × 26 μm, n = 20), cylindrical to clavate, rounded at the apex, 8-spored, bitunicate, short pedicellate. Ascospores 31–40 × 7–10 μm ( = 35 × 10 μm, n = 30), partially overlapping, arranged obliquely bi- to tri-seriate, clavate, broadest at the third cell from the apex, hyaline to pale yellow when young, dark yellow, yellowish brown when mature, 7–10-septate, slightly constricted at the septa, sometimes slightly curved.