Gamsomyces aquaticus (W. Dong, H. Zhang & K.D. Hyde) J. Yang & K.D. Hyde, comb. nov.

MycoBank number: MB 559611; Index Fungorum number: IF 559611; Facesoffungi number: FoF 12801

Basionym: Pseudobactrodesmium aquaticum W. Dong, H. Zhang & K.D. Hyde, Frontiers in Microbiology 11(no. 565): 5 (2020)

Saprobic on submerged wood in freshwater. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Colonies sporodochial, superficial, effuse, gregarious or scattered, brown, punctiform. Mycelium mostly immersed, composed of septate, branched, hyaline hyphae. Conidiophores 26–38 × 3–4.5 μm ( = 34 × 3.8 μm, n = 10), macronematous, mononematous, fasciculate, compact, erect, subcylindrical, the apex slightly wider than the base, septate, slightly constricted at septa, usually unbranched, brown, smooth. Conidiogenous cells enteroblastic, with inconspicuous proliferations, integrated, terminal, subcylindrical, pale brown. Conidia (80–)90–105 × 68.5 μm ( = 95 × 7.5 μm, n = 20), acrogenous, solitary, dry, thin-walled, smooth-walled, clavate when young, subcylindrical to narrowly fusiform, or subulate when mature, straight or slightly curved, euseptate, (15–)16–19-phragmoseptate, slightly constricted and darker at septa, pale brown to brown, obscurely guttulate, wedge-shaped at basal cell, with tapering apical cells, often enveloped by a hyaline, spherical, thin, gelatinous sheath at the apex, 13–20 μm diam. Apical cells elongated, up to 6 μm long, tapering gradually toward the apex, easily becoming senescent, subhyaline, with obscured, subglobose tuberculate ends.