Re-evaluation of the synonymy between Keratinomyces ceretanicus and Trichophyton ajelloi

In 1987, Keratinomyces ceretanicus was reduced to synonymy with Trichophyton ajelloi based on mating between the putative ex-type culture, ATCC 58594, and minus mating strains of Arthroderma uncinatum. Although we confirm that ATCC 58594 produces fertile ascomata when mated with A. uncinatum, we demonstrate that this strain is not representative of the type of K. ceretanicus and conclude that K. ceretanicus should be maintained as a separate taxon.