OK I've been WP:BOLD and transfered all the lists of different types of superficial fungal infections to Dermatophytosis, as clearly athlete's foot and nail infections are neither rings nor raised on skin surface (hence initial thought that there might be a worm underneath).  

 As per convention, articles on diseases are separate from articles on the biology of causative organisms. Hence mycology is study of fungi and their diseases are mycosis, fungi that grow parasitically on the skin/nails are dermatophytes and cause dermatophytosis infections.  

 I agree SvNH, that all cases of ringworm on the body are Tinea corporis, but not all cases of Tinea corporis appear as ringworm. Also infection in the beard area may reasonably be call ringworm if composed of raised red rings with central healing. However macerated (thickened pale damp) split skin in a deep neck opr chin skin crease may have appearances more in keeping the athlete's feet in the web spaces between the toes, than raised red rings. So Ringworm is more of a description of an appearance that allows diagnosis (of a fungal infection) whereas Tinea corporis or Tinea capitis are more classifications by location. The term for nail infections (onychomycosis) is both specific for location (nails) and a given set of possible appearances -which does not include raised red rings, but rather of discolouration, thickening and lifting of the nails (onycholysis).