Schizodon nasutus Kner, 1858

Fig. 5

Body elongated; greatest depth contained 3.0 to 4.3, caudal peduncle depth 10.2 to 10.4 times in SL; head length 4.0 to 4.5, predorsal distance 2.0 to 2.2, caudal peduncle length 8.3 to 8.5 in SL; snout length 2.2 to 2.8, horizontal orbital diameter 3.6 to 4.6, least interorbital width 2.0 to 2.6 and dentary width 5.0 to 5.5 in HL. Mouth subterminal, snout prominent; premaxilla and dentary with 4 teeth, no maxillary teeth. Lateral line with 42 or 43 pored scales; transverse series above lateral line with 5 or 5½ scale rows and below with 4-5 scale rows. Dorsal fin with 14, pectoral fin with 15, pelvic fin with 9, anal fin with 9 or 10 and caudal fin with 19 rays (Garavello, Britski, 1990). Ground color silvery to yellowish; black horizontally elongated blotch on caudal peduncle, extending to median caudal-fin rays. Yellowish fins (Graça, Pavanelli, 2007).

Maximum standard length. 390.0 mm (Graça, Pavanelli, 2007).

Distribution. Río de la Plata basin.