Description of a new species of Bryconamericus (Teleostei, Characidae) from the basin of the Golfo de Paria, northeastern Venezuela

César Román Valencia

doi:10.22179/revmacn.4.14

Abstract

The new fish species Bryconamericus lassorum is described from the basin of the Golfo de Paria, northoastern Venezuela, It can be dislinguished from other species of Bryconamericus by the possession of a foramen on the maxilla, located adjacent to the anterior toolh-hearing borie, by the presence of a large, elongate apophysis on the orhitosphenoid, and by the insertion of the proximal and riidial coinponeiits of the dorsal fin pterygiophores between the neural spines of the 13-19th vertcbrao

Highlights

Abstrack The new fish species Bryconarnericus lassorum is described from the basin of the Golfo de Paria, northoastern Venezuela, It can be dislinguished from other species of Brycor~anrricusby the possession of a foramen on the maxilla, located adjacent to the anterior toolh-hearingborie, by the presence of a large, elongate apophysis on the orhitosphenoid,and by the insertion of the proximal and riidial coinponeiits of the dorsal fin pterygiophoresbetween the neural spines of the 13-19thvertcbrao
Seven valid species are recognized ibr Venezuela (B. alpha,B. breuiceps, B. cismontanus, B. herelesthes, U. loisae, B. motatanensis and B. meridaej being the genus distributed throughout all the areas of the country (Roman-Valencia, 2000a)
Measurements on 14 specimens were made wit11 digital calipers to 0.01-mm precision, and expressed as percentage or the standard (SL) and head lengths (HL) (Table 1).Fin-ray, scale and teeth counts were made with the aid of a stereomicroscope, a dissecting needle and, occasionally, methyl blue staining solution

Summary

Introduction

Abstrack The new fish species Bryconarnericus lassorum is described from the basin of the Golfo de Paria, northoastern Venezuela, It can be dislinguished from other species of Brycor~anrricusby the possession of a foramen on the maxilla, located adjacent to the anterior toolh-hearingborie, by the presence of a large, elongate apophysis on the orhitosphenoid,and by the insertion of the proximal and riidial coinponeiits of the dorsal fin pterygiophoresbetween the neural spines of the 13-19thvertcbrao. Bryconamericus is a speciose and complex genus ofthe family Characidae,widely distributed in Central and South America (Roman-Valencia, 2000a). Species of the genus are abundant both in small brooks and on the banks of iarger running waters, with high concentrations of dissolved oxygen Seven valid species are recognized ibr Venezuela (B. alpha,B. breuiceps, B. cismontanus, B. herelesthes, U. loisae, B. motatanensis and B. meridaej being the genus distributed throughout all the areas of the country (Roman-Valencia, 2000a). The purpose of this paper is to describe a new spcies of Bryconamericus from Venezuela

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