Tubeufiales » Tubeufiaceae » Neohelicomyces

Neohelicomyces grandisporus

Neohelicomyces grandisporus Z.L. Luo, Boonmee & K.D. Hyde

Index Fungorum number: IF 818824; Facesoffungi number: FoF 02646

Holotype: HKAS 92812

Etymology: ‘grandisporus’ referring to large filamentous conidia.


Saprobic on submerged decaying wood. Sexual morph: Undetermined. Asexual morph: Colonies on the substratum superficial, effuse, gregarious, hyaline to white. Mycelium partly immersed, partly superficial, hyaline to pale brown, septate, sparsely branched hyphae, with masses of crowded, glistening conidia. Conidiophores pale brown, macronematous, erect, septate, branched, 107–161 μm long ( = 134 μm, SD = 27, n = 10), 4-5 μm wide ( = 4.5 μm, SD = 0.5, n = 10), smooth-walled. Conidiogenous cells holoblastic, polyblastic, integrated, each with single conidium. Conidia 165–214 μm long ( = 189 μm, SD = 25, n = 30), conidial filament 4.5–5.5 μm wide (› = 5 μm, SD = 0.5, n = 30), loosely coiled 1-1½ times, rounded at apical end, pale brown to brown, smooth-walled. (Description from Luo et al. 2017)


Material examined: CHINA, Yunnan Province, saprobic on decaying wood submerged in the Nujiang River, May 2015, Z.L. Luo, N2-4-1 (HKAS 92812, holotype), ex-type living culture, KUMCC 15-0470, MFLUCC.


Notes: Neohelicomyces grandisporus resembles N. aquaticus in having macronematous, septate conidiophores, helicoid, tightly to loosely coiled conidia. However, N. grandisporus differs from N. aquaticus in having shorter conidiophores (107–161 vs 240–335.5 μm), polyblastic conidiogenous cells, wider conidia (4.5–5.5 vs 2.5–3.5 μm) and conidial filaments coiled 1–1½ vs 2–2½ times. The polyblastic conidiogenous loci appear in a whorl below the upper septum in each cell. The phylogenetic analysis showed that N. grandisporus separates from other species of Neohelicomyces with strong bootstrap support (97% ML/ 92 MP / 1.00 BYPP). (Notes from Luo et al. 2017)


Freshwater distribution: China (Luo et al. 2017)