Metynnis lippincottianus (Cope, 1870)

Fig. 15

Body deep; greatest depth contained 1.3 to 1.5 and caudal peduncle depth 9.2 to 9.6 times in SL; head length 3.7 to 3.8, predorsal distance 1.4 to 1.6 and caudal peduncle length 17.4 to 20.0 in SL; snout length 2.6 to 3.6, horizontal orbital diameter 2.2 to 2.9 and least interorbital width 2.3 to 2.6 in HL. Mouth terminal; inner row of premaxilla with 4, outer row with 2; inner dentary row with 1, outer with 4; maxilla toothless. Lateral line complete, with 82-84 pored scales; transverse series above lateral line with 30-43 scale rows and below with 36-38 scale rows. Ventral keel with 30-33 simple spines, plus 3-5 slighlty bufurcate spines. Dorsal fin with 15-16, pectoral fin with 14-16, pelvic fin with 7, anal fin with 24-27, and caudal fin with 19 rays. Ground color silvery; black rounded humeral spot with diffuse limits; several deep-lying black spots over body; during reproductive period, several patches or stripes of red pigmentation appear mainly on ventral portion of body. Pectoral fin red, pelvic fin black in males and red in females; dorsal fin with black blotch and sparse patches of red pigmentation; anal fin hyaline; caudal fin hyaline, except for dark-grey margin (Graça, Pavanelli, 2007).

Maximum standard length. 170.2 mm (Graça, Pavanelli, 2007).

Distribution. Drainages of Venezuela and French Guiana, Amazon basin, drainages of Northeastern Brasil, rio São Francisco and upper rio Paraná basins (Ota, 2015).

Remarks. Metynnis lippincottianus is a possible non-native species from the upper rio Paraná, and its occurrence can be associated with the releasing of specimens for restocking, or with the aquarium trade (Ota, 2015).