Jenynsia Guenther

Gastón Aguilera & Juan Marcos Mirande, 2005, A new species of Jenynsia (Cyprinodontiformes: Anablepidae) from northwestern Argentina and its phylogenetic relationships., Zootaxa 1096, pp. 29-39 : 29-30

publication ID

z01096p029

publication LSID

lsid:zoobank.org:pub:247DF4C5-CAD0-4989-8D49-F5A0FEAC0C01

DOI

https://doi.org/10.5281/zenodo.6269015

persistent identifier

https://treatment.plazi.org/id/A9A709F1-70C2-6F44-8965-1CD92A8DE45A

treatment provided by

Thomas

scientific name

Jenynsia Guenther
status

 

[[ Jenynsia Guenther View in CoL View at ENA   ZBK ]]

The genus Jenynsia Guenther   ZBK is comprised of 11 species of small viviparous fishes, which are diagnosed by the possession of tricuspidate teeth in the outer mandibular series in adults, and an unscaled tubular gonopodium formed principally by anal-fin rays 3, 6, and 7 (Parenti, 1981). This genus is distributed in the Río de la Plata basin, coastal Atlantic drainages from Rio de Janeiro in Brazil to Río Negro Province in Argentina, and in the endorheic Río Salí -Dulce basin, in northwestern Argentina.

In his phylogenetic analysis of the family Anablepidae, Ghedotti (1998) recognized two clades within Jenynsia   ZBK , which were formally recognized by him as the subgenera Plesiojenynsia   ZBK and Jenynsia   ZBK . Two new species have recently been described from southern Brazil, Jenynsia weitzmani Ghedotti, Downing-Meisner & Lucinda   ZBK and J. onca Lucinda, Reis & Quevedo   ZBK . According to the phylogenetic framework put forward by Ghedotti (1998); these species belong in the monophyletic subgenera Plesiojenynsia   ZBK and Jenynsia   ZBK , respectively.

In Argentina four species of Jenynsia   ZBK are represented, all in the subgenus Jenynsia   ZBK . Of these, only J. pygogramma Boulenger   ZBK and J. maculata Regan   ZBK have their type localities within the country. In the upper Río Salí basin, in Tucumân, two species of this genus were cited as Jenynsia sp. A and Jenynsia sp. B ( Butí & Miquelarena, 1995). The first of these species corresponds to the broadly distributed Jenynsia multidentata (Jenyns) , and the latter is the new species herein described. The purpose of this paper is to describe Jenynsia tucumana   ZBK n. sp. from the Río Vípos, Tucumân, Argentina, and to discuss its phylogenetic relationships.

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