Astyanax pirabitira Lucena, Bertaco & Berbigier 2013

This species is distinguished from its congeners by the combination of the following characters: body depth 27.1-34.0% of standard length; interorbital width 22.2-28.7% of head length; head depth 72.9-97.0% of HL; 15-20 branched rays on anal fin; 37-40 lateral line scales; one or two maxillary teeth; two humeral spots; and absence of bony hooks in the anal fin of males (Ref. 94017).

Dorsal soft rays (total): 1011; Vertebrae: 35 - 38

Occurs in streams and rivers, inhabiting lotic shallow areas (up to 1 m deep) with clear water and bottom composed of gravel and stones, at altitudes from 800 to 1200 m above sea level. Syntopic with Astyanax brachypterygium, ustraloheros sp., Cnesterodon brevirostratus, Eurycheilichthys sp., Jenynsia eirmostigma, Pareiorhaphis hystrix, Rhamdia sp., and Trichomycterus tropeiro (Ref. 94017).

Occurs in streams and rivers, inhabiting lotic shallow areas (up to 1 m deep) with clear water and bottom composed of gravel and stones, at altitudes from 800 to 1200 m above sea level. Syntopic with Astyanax brachypterygium, ustraloheros sp., Cnesterodon brevirostratus, Eurycheilichthys sp., Jenynsia eirmostigma, Pareiorhaphis hystrix, Rhamdia sp., and Trichomycterus tropeiro (Ref. 94017).