Acestrorhynchus pantaneiro Menezes, 1992

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: 18

publication ID 10.1590/1982-0224-20170094


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Acestrorhynchus pantaneiro Menezes, 1992


Acestrorhynchus pantaneiro Menezes, 1992  

Fig. 3 View Fig

Body elongated; greatest depth contained 3.6 to 4.8 and caudal peduncle depth 12.1 to 14.9 times in SL; head length 3.0 to 3.6, predorsal distance 1.5 to 1.8 and caudal peduncle length 9.8 to 13.1 in SL; snout length 2.8 to 3.3, horizontal orbital diameter 3.5 to 5.0 and least interorbital width 3.5 to 4.6 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 93-108 pored scales; transverse series above lateral line with 26-30 scale rows and below with 15-17 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. 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; anal and pectoral fin with distal margins black ( Graça, Pavanelli, 2007).

Maximum standard length. 180.0 mm ( Graça, Pavanelli, 2007).

Distribution. Río de la Plata and rio Mamoré basins.

Remarks. Acestrorhynchus pantaneiro   is a non-native species from the upper rio Paraná basin, and its recent occurrence can be associated with the functioning of the Canal da Piracema, a fish ladder that connects the region downstream from the Itaipu Dam to the region upstream from the dam ( Graça, Pavanelli, 2007).