New Astyanax from the upper rio Tapajós drainage, Central Brazil (Characiformes: Characidae)

This dataset contains the digitized treatments in Plazi based on the original journal article Bertaco, Vinicius A., Garutti, Valdener (2007): New Astyanax from the upper rio Tapajós drainage, Central Brazil (Characiformes: Characidae). Neotropical Ichthyology 5 (1): 25-30, DOI: 10.1590/S1679-62252007000300002, URL: scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000300002&lng=en&tlng=en Astyanax utiariti, new species, is described from the upper rio Tapajós drainage, Mato Grosso, Brazil.

Astyanax utiariti has a horizontally oval black humeral spot, a lozenge-shaped caudal-peduncle spot, continuing to the tip of the middle caudal-fin rays, and two brown bars in the humeral region that allows its inclusion in the A. bimaculatus species group. It also possesses a black stripe extending along midlateral body. The new species is distinguished from its congeners by a reticulate scale pattern, a black longitudinal stripe, toothless maxilla, larger dentary teeth and teeth of the inner row of the premaxilla with five to seven cusps, body depth 33.3-39.9% of standard length (SL), head length (HL) 23.9-26.4% of SL, caudal-peduncle depth 12.0-13.4% of SL, orbital diameter 28.5-34.3% of HL, interorbital width 32.7-38.4% of HL, 36-38 perforated scales along the lateral line, and 22-26 branched anal-fin rays.