<unk>  is a soil-associated dermatophyte that occasionally is known to colonise and infect the upper dead layers of the skin of mammals. The name refers to an asexual "form-taxon" that has been associated with four related biological species of fungi: the pathogenic taxa Arthroderma incurvatum, A. gypsea, A. fulva and the non-pathogenic saprotroph A. corniculata. More recent studies have restricted M.<unk>  to two teleomorphic species A.<unk>  and A. incurvatum. The conidial states of A. fulva and A. corniculata have been assigned to M. fulvum and M. boullardii. Because the anamorphic states of these fungi are so similar, they can be identified reliably only by mating. Two mating strains have been discovered, "+" and "–". The classification of this species has been based on the characteristically rough-walled, blunt, club-shaped, multicelled macroconidia. Synonyms include Achorion<unk> ,<unk>  flavescens, M. scorteum, and M. xanthodes. There has been past nomenclatural confusion in the usage of the generic names<unk>  and Microsporon.
Microsporum gypseum
Epidermophyton floccosum
Microsporum fulvum
Malassezia furfur
Trichophyton rubrum
Alternaria tenuissima
Trichobacteriosis axillaris
Trichomonas tenax