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Type: Article
Published: 2017-09-14
Page range: 173–182
Abstract views: 182
PDF downloaded: 1

A new species of Astyanax Baird & Girard (Characiformes: Characidae) from the upper rio Araguaia, Central Brazil

Universidade Estadual de Maringá, Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Av. Colombo, 5790, 87020-900 Maringá, PR, Brazil.
Universidade Estadual de Maringá, Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Av. Colombo, 5790, 87020-900 Maringá, PR, Brazil. Universidade Estadual de Maringá, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Av. Colombo, 5790, 87020-900 Maringá, PR, Brazil.
Fundação Zoobotânica do Rio Grande do Sul, Museu de Ciências Naturais—Laboratório de Ictiologia, Av. Salvador França, 1427, Jardim Botânico, 90690-000 Porto Alegre, RS.
Pisces Characiformes Characidae

Abstract

We describe a new species of Astyanax from the upper rio Araguaia basin, Mato Grosso State, Brazil. The new species presents a combination of characters that indicates its allocation within the A. scabripinnis species complex. The new species differs from congeners belonging to the A. scabripinnis species complex by a combination of the following characters: lateral dark stripe beginning immediately behind the upper margin of the opercle; a single vertical humeral dark blotch; a scattered pattern of dark chromatophores below lateral line, at the abdominal region; 15 to 20 branched anal-fin rays; lateral line with 33 to 36 perforated scales; dentary teeth decreasing abruptly in size from the fourth or fifth tooth onwards; and 13 or 14 circumpeduncular scales.

 

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