Neohelicosporium
Neohelicosporium Y.Z. Lu, J.C. Kang & K.D. Hyde, in Lu et al., Mycol. Progr. 17(5): 637 (2017).
Index Fungorum number: IF 822045; Facesoffungi number: FoF 03570, 22 morphological species (Species Fungorum 2022), 18 species with molecular data.
Saprobic on submerged decaying wood. Sexual morph: Unknown. Asexual morph: hyphomycetous, helicosporous. Colonies on the substratum superficial, effuse, gregarious, white to light pink. Mycelium composed of partly immersed, partly superficial, hyaline to pale brown, septate, branched hyphae, with masses of crowded, glistening conidia. Conidiophores micronematous or macronematous, mononematous, erect, flexuous, cylindrical, septate, arising directly on substrate, pale brown, smooth-walled. Conidiogenous cells holoblastic, mono- to polyblastic, integrated, intercalary, cylindrical, with denticles pale brown, smooth-walled. Conidia coiled 2.5–3.5 times when tightly coiled, becoming loosely coiled in water, rounded at the tip, multi-septate, verrucose, guttulate, hyaline (adapted from Lu et al. 2017).
Type species: Neohelicosporium parvisporum Y.Z. Lu, J.C. Kang & K.D. Hyde
Notes: Neohelicosporium resembles Helicosporium in conidial morphology but has distinct conidiophores. The conidiophores of Neohelicosporium are flexuous, branched, hyphae-like while the conidiophores of Helicosporium are erect, unbranched, fertile in the middle, sterile and tapering towards a narrow subacute apex. Neohelicosporium is morphologically and phylogenetically a distinct and well-defined genus in Tubeufiaceae. Molecular markers available for Neohelicosporium are ITS, LSU, SSU, RPB2 and TEF-1.
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