New and poorly known characiform fishes (Teleostei: Characiformes: characidae) from French Guyana. A new tetra of the genus Bryconamericus
Résumé
Bryconamericus guyanensis sp. n. is described from French Guyana. The new species is closely related to B. subtilisform ROMAN-VALENCIA, 2003 and characterized by the following features: (1) body depth relatively low (3.49-4.16), (2) anal-fin with 19-21 branched rays, (3) 17-21 setiform (4) 38-41 scales in a longitudinal row, (5) 4 1/2-5/1/3 transversal scales, (6) 37 to 40 vertebrae (total), (7) two to three tri- to quincuspid maxillary teeth, and (8) premaxilla in the outer row with four to five (mostly five) tri- to quincuspid teeth which are implanted in an irregularly row.