Helicomyces Link, Mag. Gesell. naturf. Freunde, Berlin 3(1–2): 21 (1809).

MycoBank number: MB 8476; Index Fungorum number: IF 8476; Facesoffungi number: FoF 00212; – 17 morphological species (Species Fungorum 2020), 4 species with molecular data.

Type species: Helicomyces roseus Link, Mag. Gesell. naturf. Freunde, Berlin. 3: 21 (1809).

Notes: Linder (1929) redefined this genus, and many of the species originally assigned to Helicomyces were reasigned to Helicosporium or Helicoma. Moore (1955) provided a key for all known Helicomyces species. Goos (1985) reviewed the taxonomic status of Helicomyces, provided updated descriptions and a key to accepted species. Lu et al. (2018b) pointed out the confusion of Helicomyces and reappraised its taxonomy and phylogeny. Twelve species were accepted in Helicomyces and four species were excluded (Lu et al. 2018b). Helicomyces is characterized by conidiophores that are 0–3-septate, arising as lateral branches from creeping hyphae, conidiogenous cells are integrated, sympodial and truncate at apex after conidial secession, and conidia are acrogenous or acropleurogenous, helicoid and rounded at tip (Link 1809; Linder 1929; Moore 1955; Goos 1985; Lu et al. 2018b).