Tuesday, December 6, 2016

[Ichthyology • 2016] Eigenmannia besouro • A New Species of the Eigenmannia trilineata species-group (Gymnotiformes: Sternopygidae) from the rio São Francisco basin, northeastern Brazil


Eigenmannia besouro 
Peixoto & Wosiacki, 2016


Abstract

A new species of the Eigenmannia trilineata species-group is described from the rio São Francisco basin, Brazil. It is distinguished from closely related species by a unique set of characters, including a subterminal mouth, the presence of ii,13–14 pectoral-fin rays, a coronomeckelian bone that is 30% the length of Meckel’s cartilage, the specific pattern of the dentition of the premaxilla and dentary, and the more anterior origin of the superior midlateral stripe. Comments on species of the E. trilineata species-group are presented.

Keywords: Pisces, diversity, glass knifefish, electric fish, species group




FIGURE 1. Eigenmannia besouro, MZUSP 57890, holotype, 91.9 mm LEA, Brazil, Bahia, São Desidério, rio São Francisco, rio Grande. (A) Left lateral view of body; (B) Head. 

Distribution. Eigenmannia besouro is known from tributaries of the left margin of rio São Francisco, Bahia, northeastern Brazil (Fig. 5).

Etymology. The species name, besouro (‘beetle’ in Portuguese) is in honor of Manoel Henrique Pereira, known as Besouro Mangangá (‘The Mangangá Beetle’), a native of the Recôncavo region of Bahia, and a legendary figure in the Afro-Brazilian martial art capoeira; a noun in opposition.



Peixoto, Luiz A. W. & Wolmar B. Wosiacki. 2016. Eigenmannia besouro, A New Species of the Eigenmannia trilineata species-group (Gymnotiformes: Sternopygidae) from the rio São Francisco basin, northeastern Brazil. Zootaxa. 4126(2); 262–270.  DOI: 10.11646/zootaxa.4126.2.6

  

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