Temporal course and changes in taxonomy and nomenclature of Trichophyton mentagrophytes and Trichophyton interdigitale. The earlier zoophilic and anthropophilic variants are grouped into species over time. Within the new species, more than ten different genotypes can be distinguished. Among these, Trichophyton mentagrophytes ITS genotype VIII represents a clinically significant “clonal offshots” and is now considered as the independent species Trichophyton indotineae. In addition, there are Trichophyton interdigitale (anthropophilic), Trichophyton mentagrophytes (zoophilic), Trichophyton erinacei (zoophilic), Trichophyton quinckeanum (zoophilic), and Trichophyton benhamiae (zoophilic).