Acestrorhynchus lacustris (Lütken, 1875)

Ota, Renata Rúbia, Deprá, Gabriel de Carvalho, Graça, Weferson Júnio da & Pavanelli, Carla Simone, 2018, Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated, Neotropical Ichthyology 16 (2), pp. 1-111 : 17

Acestrorhynchus lacustris (Lütken, 1875)

Fig. 3

Body elongated; greatest depth contained 4.2 to 5.3 and caudal peduncle depth 13.2 to 15.6 times in SL; head length 3.1 to 3.6, predorsal distance 1.5 to 1.7 and caudal peduncle length 12.5 to 14.0 in SL; snout length 2.5 to 2.8, horizontal orbital diameter 2.8 to 5.0 and least interorbital width 4.0 to 5.4 in HL. Mouth terminal; outer row of premaxilla with 13-16 and inner row with 10-20, and maxilla with 16-39 teeth. Lateral line complete, with 86- 102 pored scales; transverse series above lateral line with 22-25 and below with 13-15 scale rows. Dorsal fin with 11, pectoral fin with 14-18, pelvic fin with 8, anal fin with 23- 27, and caudal fin with 19 rays ( Menezes, 1992). Ground color silvery to yellowish; black rounded humeral blotch; black oval, horizontally elongated, blotch on caudal-fin base, extending to median caudal-fin rays. Yellowish fins ( Graça, Pavanelli, 2007).

Maximum standard length. 280.0 mm ( Graça, Pavanelli, 2007).

Distribution. Upper rio Paraná and rio São Francisco basins.

Figures

Fig. 3. a. Acestrorhynchus lacustris, 150.0 mm SL, fresh specimen, uncat. b. Acestrorhynchus pantaneiro, 147.0 mm SL, fresh specimen, uncat. c. Leporellus vittatus, NUP 1902, 200.0 mm SL, Itaipu Reservoir, Foz do Iguaçu, State of Paraná.