Diagnosis by Isozyme Methods of Two Cryptic Species, Psychodopygus Carrerai and P. Yucumensis (Diptera: Psychodidae)1

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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 genotypic frequencies departed from Hardy-Weinberg equilibrium and the allele frequencies were different. The genetic distance between the 2 species is relatively small, suggesting that they are closely related.

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