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Issue: Vol. 4790 No. 3: 12 Jun. 2020
Type: Article
Published: 2020-06-12
DOI: 10.11646/zootaxa.4790.3.5
Page range: 505–514
Abstract views: 109
PDF downloaded: 4

A new species of Characidium (Characiformes: Crenuchidae) from the upper rio São Francisco basin, Minas Gerais, Brazil

Laboratório de Ictiologia, Programa de Pós-Graduação em Biodiversidade e Evolução, Instituto de Biologia, Universidade Federal da Bahia, Rua Barão de Jeremoabo, 147, Ondina, 40170-290, Salvador, BA, Brazil.
Departamento de Ciências Biológicas, Centro Federal de Educação Tecnológica de Minas Gerais, Avenida Amazonas, 5253, Nova Suíssa, 30421-169, Belo Horizonte, MG, Brazil.
Departamento de Ciência e Tecnologia Ambiental, Centro Federal de Educação Tecnológica de Minas Gerais, Avenida Amazonas, 5253, Nova Suíssa, 30421-169, Belo Horizonte, MG, Brazil.
Museu de Ciências Naturais, PUC Minas, Avenida Dom José Gaspar, 290, Coração Eucarístico, 30535-901, Belo Horizonte, MG, Brazil.
Laboratório de Ictiologia, Programa de Pós-Graduação em Biodiversidade e Evolução, Instituto de Biologia, Universidade Federal da Bahia, Rua Barão de Jeremoabo, 147, Ondina, 40170-290, Salvador, BA, Brazil.
Pisces Characidiinae endemism Neotropical region rio Cipó taxonomy

Abstract

Characidium cacah, new species, apparently endemic to the rio das Velhas sub-basin, upper rio São Francisco basin, Brazil, is described. The new species is easily distinguished from congeners, except C. chicoi, C. helmeri, C. mirim, C. nana, C. nupelia, C. stigmosum and C. xavante, by having an incomplete lateral line and for lacking an adipose fin. The new species can be diagnosed from the aforementioned species by a series of characters, including the presence of 12 circumpeduncular scales, the isthmus completely scaled, a thin inconspicuous or dashed midlateral dark stripe, the absence of a conspicuous peduncular blotch, and humeral blotch and basicaudal spot variably marked.

 

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