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A new species of Aphyocharax Günther, 1868 (Characiformes, Characidae) from the Maracaçumé river basin, eastern Amazon

2019; Pensoft Publishers; Volume: 95; Issue: 2 Linguagem: Inglês

10.3897/zse.95.36788

ISSN

1860-0743

Autores

Pâmella Silva de Brito, Erick Cristofore Guimarães, Luís Fernando Carvalho-Costa, Felipe Polivanov Ottoni,

Tópico(s)

Ichthyology and Marine Biology

Resumo

A new species of Aphyocharax is described from the Maracaçumé river basin, eastern Amazon, based on morphological and molecular data. The new species differs from all its congeners, mainly by possessing the upper caudal-fin lobe longer than the lower one in mature males, and other characters related to teeth counts, colour pattern, and body depth at dorsal-fin origin. In addition, the new species is corroborated by a haplotype phylogenetic analyses based on the Cytochrome B (Cytb) mitochondrial gene, where its haplotypes are grouped into an exclusive lineage, supported by maximum posterior probability value, a species delimitation method termed the Wiens and Penkrot analysis (WP).

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