Diagnosis by isozyme methods of two cryptic species, Psychodopygus carrerai and P. Yucumensis (Diptera: Psychodidae)

Abstract

Abstract. Eleven enzyme systems were used to compare 2 cryptic species previously treated as Psychodopygus carrerai. Two enzyme systems were each completely diagnostic. Three other loci gave evidence of reproductive isolation: the combined ge notypic frequencies departed from Hardy-Weinberg equilibri um and the allele frequencies were different. The genetic dis tance between the 2 species is relatively small, suggesting that they are closely related.