Jenynsia luxata, a new species from Northwestern Argentina, with additional observations of J. maculataRegan and phylogeny of the genus (Cyprinodontiformes: Anablepidae) release_lpttd5a4xrhfvdenjhpeqsmhcu

by Gastón Aguilera, Juan Marcos Mirande, Pablo A. Calviño, Luis Fernando Lobo

Published in Neotropical Ichthyology by FapUNIFESP (SciELO).

Volume 11p565-572 (2013)


Jenynsia luxata, a new species from northwestern Argentina, is described. This species is diagnosable from all other Jenynsia by the medial processes of left and right pelvic bones relatively reduced and separated from each other. The new species resembles J. multidentata, but it is further distinguished from this species by the absence of a swelling between the urogenital opening and the anterior base of the anal fin in females and details of coloration. Phylogenetic analyses, both under implied and equal weighting, recover the subgenera Plesiojenynsia and Jenynsia as monophyletic units. New information on previously missing characters of Jenynsia maculata is added. These data and phylogenetic characters coded for the new species herein described contribute to a better resolution of the phylogenetic relationships within the subgenus Jenynsia, which is herein supported by additional synapomorphies relative to previous phylogenies.
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