Taxonomic status of Jenynsia cf. alternimaculata (Cyprinodontiformes: Anablepidae) from the Río Arenales basin, Salta, Argentina

AGUILERA, GASTÓN; MIRANDE, JUAN MARCOS

Tafí del Valle, Tucumán

Congreso; XXII Reunión científica anual de la Asociación de Biología de Tucumán; 2006

The family Anablepidae is composed by 3 genera. Among them, Jenynsia, is the most diverse.  Ghedotti (1998) analyzed the phylogenetic relationships of the family. In Salta, Argentina, two  species of Jenynsia are present, J. maculata and J. alternimaculata. The latter is very similar to the specimens found in Río Arenales. As the type locality of Jenynsia alternimaculata ís ín the Río Bermejo Basin and the Río Arenales do not belong to it, the taxonomic status of the specimens of the latter river is tested in thís work. A reanalysis of the Ghedotti´s (1998) matrix was performed with TNT, by using implicit enumeration under equal and implied weighting.   The specimens from Río Arenales are separated in all the analysis from J. alternimaculata, possibly conforming two different species.