Neohelicomyces denticulatus L.L. Liu, J. Yang & Z.Y. Liu, sp. nov.

MycoBank number: MB 559605; Index Fungorum number: IF 559605; Facesoffungi number: FoF 12795

Etymology: referring to the denticulate conidiogenous cells.

Holotype: GZAAS 20-0339

Saprobic on decaying submerged wood in freshwater habitats. Asexual morph: Colonies effuse, white tinged with yellow, cottony. Mycelium mostly superficial and partly immersed, composed of branched, septate, thin-walled, smooth, subhyaline hyphae. Conidiophores macronematous, mononematous, pale brown, paler to the apex, erect or repent, straight, branched, multi-septate, tapering distally, 111–236 × 3–6.5 μm ( = 166 × 4.5 μm, n = 20). Conidiogenous cells monoblastic, integrated, terminal or intercalary, determinate, denticulate; denticles tiny, cylindrical. Conidia holoblastic, acropleurogenous, solitary, hyaline, helicoids, indistinctly multi-septate, rounded at tip, hygroscopic, often guttulate, tightly coiled 2-4 times in one plane, becoming loosely coiled or uncoiled in water, 16.5–21.5μm diam. and conidial filament 1.5–2.5μm ( = 2 μm, n = 20) wide, 83.5–121 μm ( = 105.5 μm, n = 20) long, smooth-walled. Sexual morph: Undetermined.