Review of the Odontesthes perugiae species group from Río de La Plata drainage, with the description of a new species (Atherinomorpha: Atherinopsidae)

JULIANA M. WINGERT; JULIANO FERRER; LUIZ R. MALABARBA

doi:10.11646/zootaxa.4250.6.1

Issue: Vol. 4250 No. 6: 10 Apr. 2017

Type: Article

Published: 2017-04-10

DOI: 10.11646/zootaxa.4250.6.1

Page range: 501–528

Abstract views: 80

PDF downloaded: 3

**Review of the Odontesthes perugiae species group from Río de La Plata drainage, with the description of a new species (Atherinomorpha: Atherinopsidae)**

JULIANA M. WINGERT⁺⁻
JULIANO FERRER⁺⁻
LUIZ R. MALABARBA⁺⁻

Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91501–970 Porto Alegre, RS, Brazil.

Pisces Odontesthes orientalis peixe-rei rio Uruguay silverside taxonomy

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Abstract

Specimens presently identified as belonging to Odontesthes perugiae species group from rio Paraná, rio Uruguay and rio Negro in Argentina, Brazil and Uruguay are revised. Two species are recognized: Odontesthes perugiae, type species of the genus with Odontesthes orientalis as a junior synonym, and a new species described herein. Odontesthes perugiae is redescribed and its distribution restricted to the lower rio Paraná, lower rio Uruguay and rio Negro basins. The new species is endemic from the upper rio Uruguay above Salto do Yucumã (Brazil) or Saltos del Moconá (Argentina) falls. Both species share with the remaining taxa included in the O. perugiae species-group (O. bicudo, O. ledae, O. mirinensis, and O. piquava) the possession of teeth of the outer row on dentary and premaxilla shorter than those in the inner row, being distinguished from them by the number of gill rakers, body measurements and some osteological characters.

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