We have reviewed all the dermatophytoses diagnosed in Galicia during four consecutive 9-year periods 1951-86 and 1987. From 4571 patients, we isolated 3 351 fungal strains belonging, in decreasing order of frequency, to the following dermatophyte species: Microsporum canis (25.5 ~), Trichophyton l~brum (24.6~o), T. mentagrophytes (21.4~o), Epidermophyton floccosum (11.8~o), M. gypseum (5.2~o),. Tinea capitis has diminished in frequency since 1951, though there was been a slight increase since 1978; M. canis has always been the most common agent, and between 1951 and 1959 T. schoenleinii was also very frequent but is no longer found. The frequency of tinea corporis, on the other hand, has experienced a considerable increase. Its most common causal agents in the last few years have been T. mentagrophytes, M. canis and I: rubrum. Until 1977 the most common tinea cruris dermatophyte was E.floccosum, but since then it has been T. rubrum. The commonest tinea pedis dermatophytes have been T. rubrum and T. mentagrophytes. Tinea unguium and tinea barbae have been the most frequent dermatophytoses, and their commonest causal agents I". rubrum and T. mentagrophytes respectively. We have documented the distribution of the various causal agents by location of the lesions, age and source of the patients (private or National Health Service patients), and we have compared the results with those obtained in other regions of Spain.

Summary: During the last 27 years, 1569 dermatophyte strains were isolated. The results are presented in three 9 year periods and according to different types of lesions. A decrease of tinea capitis accompanied by an increase of most of the other forms of tinea could be demonstrated. Onychomycoses were rarely observed. M. canis was the dermatophyte which was most frequently isolated. T. rubrum was more frequent than T. mentagrophytes, especially during the last yeasr. E. floccosum showed a considerable increase and represented 12.87% of all dermatophytes isolated during the last 9 yeasrs. Mycoses caused by M. gypseum were comparatively common. Zusammenfassung: In 27 Jahren wurden 1569 Dermatophyten‐Stämme isoliert. Die Ergebnisse werden getrennt nach 9‐Jahresperioden und nach Krankheitsbildern aufge‐fuhrt. Bemerkenswert ist die Abnahme der Tinea capitis und die Zunahme der meisten ubrigen Tinea‐Formen. Sehr selten wurden Onychomykosen gesehen. Der am häufigsten isolierte Dermatophyt war M. canis. T. rubrum wurde besonders in den letzten Jahren häufiger gefunden als T. mentagrophytes. E. floccosum zeigte einen erheblichen Anstieg auf 12.87% der isolierten Dermatophyten in den letzten 9 Jahren. Relativ häufig waren auch Mykosen durch M. gypseum.

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Describimos las caracteristicas morfol6gicas y fisiol6glcas de un nuevo dermatofito. Macroscopicamente forma colonias plegadas, pulverulentas, con tendencia a resquebrajarse, de color castafio, a veces un poco rojizas. Mieroscopicamente presenta numerosas macroconidias en todos los cultivos, similares a los de los Triehophyton, con tendencia a germinar rapidamente antes de desprenderse del micelio que les ha dado origen, mas abundantes en los cultivos 26 ° C. Existen tambi6n aleurias sobre todo frecuentes cuando crete a 37 ° C.Despues de realizar un estudio comparativo con todas las especies actualmente vMidas, pensamos se trata de una nueva especie, a la que proponemos designar con el tdrmino de