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Issue: Vol. 5496 No. 3: 20 Aug. 2024
Type: Article
Published: 2024-08-20
DOI: 10.11646/zootaxa.5496.3.2
Page range: 332-342
Abstract views: 435
PDF downloaded: 9

A new restricted-range Melanorivulus (Cyprinodontiformes: Rivulidae) from the upper rio Guaporé, Chapada dos Parecis, Brazil

Universidade de Taubaté; UNITAU; Laboratório de Zoologia; Departamento de Biologia; Av. Tiradentes 180; 12030–180; Taubaté; SP; Brazil
Universidade Federal do Amazonas; Departamento de Biologia; Av. Rodrigo Otávio; Japiim; 69077–000; Manaus; AM; Brazil
Pisces Amazon biome Rio Madeira basin Melanorivulus modestus Melanorivulus zygonectes species group taxonomy

Abstract

A new species of Melanorivulus, belonging to the Melanorivulus zygonectes species group, is described from the rio Galera, a tributary of the right bank of the upper rio Guaporé, Amazon basin, Mato Grosso state, Brazil. It is diagnosed from congeners by the following combination of characters: absence of pelvic fins; presence of a black band along the entire caudal-fin margin in males, typically more conspicuous on dorsal and ventral portions; presence of a wide oblique bars anteriorly and wide chevron-like marks posteriorly to middle of flank. This is the first record of the genus Melanorivulus for the rio Madeira basin.

 

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