Imparfinis mirini Haseman, 1911

Fig. 21

Body elongated; greatest body depth contained 5.1 to 5.3, head depth 7.7 to 8.0 and caudal peduncle depth 9.4 to 10.0 times in SL; head length 5.0 to 5.4, anal-fin base length 6.3 to 6.8, adipose-fin base length 4.6 to 4.8 and maxillary-barbel length 2.5 to 2.6 times in SL; snout length 1.9 to 2.4, horizontal orbital diameter 6.0 to 6.3 and least interorbital width 2.5 to 2.6 times in HL. Mouth terminal; premaxilla and dentary with several diminute and viliform teeth. Dorsal fin with 7, pectoral fin with 8-11, pelvic fin with 6 and anal fin with 11-14 rays. Ground color pale yellow; dark-brown transverse bars on dorsum; dark-brown inconspicuous longitudinal stripe along lateral line. Yellowish fins (Graça, Pavanelli, 2007).

Maximum standard length. 64.4 mm (Graça, Pavanelli, 2007).

Distribution. Upper rio Araguaia and upper Paraná basins (Eschmeyer et al., 2017).