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Issue: Vol. 5330 No. 4: 17 Aug. 2023
Type: Article
Published: 2023-08-17
DOI: 10.11646/zootaxa.5330.4.6
Page range: 586-596
Abstract views: 425
PDF downloaded: 22

A new Moenkhausia (Characiformes: Characidae) from rio Braço Norte, rio Tapajós basin, with comments on the fish endemism of Serra do Cachimbo plateau

Museu de Zoologia da Universidade de São Paulo; Av. Nazaré 481; 04263000; São Paulo; SP; Brazil
Museu de Zoologia da Universidade de São Paulo; Av. Nazaré 481; 04263000; São Paulo; SP; Brazil
Universidade do Estado de Minas Gerais; Unidade Acadêmica Passos; Avenida Juca Stockler; 1130; 37900106; Passos; Minas Gerais; Brazil
Departamento de Biologia; Universidade Federal do Amazonas; Av. Jauary Marinho; Setor Sul; 69077-000; Manaus; AM; Brazil
Museu de Zoologia da Universidade de São Paulo; Av. Nazaré 481; 04263000; São Paulo; SP; Brazil
Pisces Amazon basin Neotropical Fishes Taxonomy Moenkhausia moisae Moenkhausia pirauba

Abstract

A new species of Moenkhausia is described from the rio Braço Norte, a tributary of Rio Teles Pires draining the Serra do Cachimbo, rio Tapajós basin, Pará, Brazil. The new species is diagnosed from all congeners, except M. moisae and M. pirauba, by having a high number of scales in the longitudinal series (43–46 vs. 23–41 in other Moenkhausia species). It can also be distinguished from the aforementioned species based on the combination of the following characters: a single humeral blotch, 21–25 branched anal-fin rays, and a round and symmetrical caudal blotch not continuous anteriorly with the dark midlateral stripe. The new tetra herein described represents an additional, possibly endemic, taxon from the headwaters draining from Serra do Cachimbo, in the Brazilian Shield.

 

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