A new species of Hyphessobrycon (Characiformes, Characidae) from the rio Uruguay basin, Argentina

A new species of Hyphessobrycon (Characiformes, Characidae) from the rio Uruguay basin, Argentina. Hyphessobrycon isiri sp. n., is described from the no Uruguay basin. Hyphessobrycon isiri sp. n. differs from the remaining species of the genus by the presence of teeth of the inner series of the premaxilla with 5 to 11 cusps, one maxillary tooth with 7 cusps; 16 to 22 branched anal-fin rays; one humeral spot vertically elongated, and a rnidlateral stripe ending in a conspicuous caudal spot.