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espanolPresentamos las afinidades filogeneticas y el codigo de barras del ADN de Gila cf. eremica, una poblacion morfologicamente divergente y geograficamente aislada de G. eremica DeMarais, 1991. Los analisis filogeneticos mitocondriales de cyt–b, cox1 y nd2 muestran la existencia de un patron de clados dentro del linaje de G. eremica, que situa a G. cf. eremica en un clado de identidad especifica que comparte un supuesto ancestro comun con G. eremica, originario de la cuenca del rio Matape. El analisis de codigo de barras, en que se utilizo un metodo basado en caracteres del programa informatico CAOS, mostro siete caracteres puros que diferencian a G. eremica de su congenere regional G. purpurea y un caracter fijo en G. cf. eremica que lo diferencia de G. eremica. Estos resultados y la reciente deteccion de diferencias morfologicas diagnosticas entre G. cf. eremica y G. eremica sostienen la hipotesis de que Gila cf. eremica es una unidad evolutivamente significativa dentro del linaje de G. eremica. EnglishWe present the phylogenetic affinities and DNA barcode of Gila cf. eremica, a geographically isolated and morphologically divergent population from G. eremica DeMarais, 1991. Mitochondrial phylogenetic analyses of cyt–b, cox1 and nd2 show a clades pattern within the G. eremica lineage, placing G. cf. eremica in a clade of specific identity to and sharing a putative common ancestor with G. eremica from the Matape River basin. The barcoding analysis using a character–based approach of CAOS showed seven single pure characters discriminating G. eremica from its regional congener G. purpurea, and one fixed character in G. cf. eremica discriminating it from G. eremica. These results and the recent detection of diagnostic morphological differences between G. cf. eremica and G. eremica support the hypothesis of Gila cf. eremica as an significant evolutionary unit within the G. eremica lineage.

Mitochondrial evidence for a new evolutionary significant unit within the Gila eremica lineage (Teleostei, Cyprinidae) in Sonora, Northwest Mexico