Pleurohelicosporium hyalinum J. Yang & K.D. Hyde sp. nov.

MycoBank number: MB; Index Fungorum number: IF; Facesoffungi number: FoF 12797;

Etymology: referring to the hyaline conidia.

Holotype: GZAAS

Saprobic on decaying submerged twig in freshwater habitats. Asexual morph: Colonies on the substratum superficial, effuse, gregarious, pale brown. Mycelium composed of partly immersed, partly superficial, pale brown, septate, branched hyphae, with masses of crowded, glistening conidia. Conidiophores macronematous, mononematous, cylindrical, branched, septate, 125–250 μm long, 4.5–6 μm wide, pale brown, smooth-walled. Conidiogenous cells holoblastic, monoblastic, integrated, sympodial, intercalary, cylindrical, with denticles, 9–13 μm long, 5–6 μm wide, pale brown, smooth-walled. Conidia solitary, pleurogenous, helicoid, rounded at tip, 14–18 μm diam. and conidial filament 1.5–2.5 μm wide ( = 16 9 2 lm, n = 20), 115–150 μm long, tightly coiled 2–3 times, becoming loosely coiled in water, indistinctly multi-septate, guttulate, hyaline, smooth-walled. Sexual morph: Undetermined.