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Issue: Vol. 4700 No. 4: 26 Nov. 2019
Type: Article
Published: 2019-11-26
DOI: 10.11646/zootaxa.4700.4.7
Page range: 487–493
Abstract views: 79
PDF downloaded: 3

Moenkhausia restricta, a new species from the upper Rio Negro, Amazon basin, northwestern Brazil (Characiformes: Characidae)

Universidade Estadual Paulista (UNESP), Instituto de Biociências, Campus de Botucatu, Departamento de Zoologia, Laboratório de Ictiologia. R. Prof. Dr. Antonio C. W. Zanin, s/n, Rubião Jr, 18618-689, Botucatu, São Paulo, Brazil.
Universidade Estadual Paulista (UNESP), Instituto de Biociências, Campus de Botucatu, Departamento de Zoologia, Laboratório de Ictiologia. R. Prof. Dr. Antonio C. W. Zanin, s/n, Rubião Jr, 18618-689, Botucatu, São Paulo, Brazil.
Pisces São Gabriel da Cachoeira Jupiaba pelvic spine Batesian mimicry

Abstract

A new shallow-bodied species of Moenkhausia is described from the upper Rio Negro, Amazon basin, Brazil. The new species is diagnosed from all congeners by the combination of a body depth not surpassing 33% in SL in adult specimens, seven scale rows between dorsal-fin origin and lateral line, five scale rows between pelvic-fin insertion and lateral line, a single conspicuous vertically elongated humeral blotch, and a conspicuous caudal peduncle blotch extending to the distal margin of the median caudal-fin rays. The new species was collected together with Jupiaba zonata, with which it shares a very similar color pattern. The similarity between these two taxa is interpreted as an additional case of Batesian mimicry between Moenkhausia and Jupiaba.

 

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