Helicoma Corda, Icon. fung. (Prague) 1: 15 (1837).
MycoBank number: MB 8473; Index Fungorum number: IF 8473; Facesoffungi number: FoF 00211; – 64 morphological species (Species Fungorum 2020), 22 species with molecular data.
Type species: Helicoma muelleri Corda, Icon. fung. (Prague) 1: 15 (1837).
Notes: Goos (1986) reviewed the status of Helicoma species. Lu et al. (2018b) introduced ten new Helicoma species, and redefined the morphological concept of Helicoma to include two additional asexual morphs, one is the typicalhelicoma morphology with conidia that are acrogenous or acropleurogenous, helicoid, circinate, dry, tapering towards apex, truncate at the base, coiled 1¼–1¾ times, not becoming loose in water. Another one is characterized by conidiogenous cells that are intercalary, cylindrical, with denticles, arising laterally from the lower portion of conidiophores as tooth-like protrusions, and conidia are pleurogenous, helicoid, hygroscopic, tapering towards apex and rounded at tip, coiled 1½–5 times, becoming loosely coiled in water (Lu et al. 2018b). Lu et al. (2018b) accepted 57 species within Helicoma, and excluded twelve species from this genus. Liu et al. (2019) reported a new species, H. hydei, from decaying wood in Thailand.