Onychocola Sigler (1990) Arachnomyces is a genus of cleistothecial ascomycete fungi described in 1902,[1] of which the anamorph (asexual) stage is the genus Onychocola.

[3][4] The placement of Arachnomyces has changed multiple times due to its morphological similarities to members of different families.

Later it was considered as part of Onygenaceae, then it was placed within the Gymnoascaceae in 1996.

Thanks to phylogenetic analyses Arachnomyces is currently recognized as a distinct monophyletic lineage, composing its own family Arachnomycetaceae and order Arachnomycetales within the class Eurotiomycetes.

[4][3] A. peruvianum A. minimus A. scleroticus A. glareosus A. pilosus A. gracilis A. kanei A. jinanicus A. nodosetosus A. nitidus A. gracilis A. pilosus A. minimus A. glareosus A. graciliformis A. nitidus A. bostrychodes A. scleroticus A. peruvianum A. kanei O. canadensis A. jinanicus There are currently 16 accepted species of Arachnomyces.