Hoplerythrinus unitaeniatus (Agassiz, 1829)

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: 46

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http://doi.org/ 10.1590/1982-0224-20170094



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Hoplerythrinus unitaeniatus (Agassiz, 1829)


Hoplerythrinus unitaeniatus (Agassiz, 1829) 

Fig. 13View Fig

Body elongated; greatest body depth contained 4.2 to 4.7 and caudal peduncle depth 6.3 to 6.6 times in SL; head length 3.1 to 3.2, predorsal distance 1.8 to 2.0 and caudal peduncle length 8.4 to 8.6 in SL; snout length 4.0 to 4.3, horizontal orbital diameter 5.2 to 5.7 and least interorbital width 2.6 to 2.7 in HL. Mouth terminal; premaxilla with 8-10, dentary with 35-38 and maxilla with 32-36 teeth. Lateral line with 35-39 pored scales; transverse series above lateral line with 3½ scale rows and below with 3 scale rows. Dorsal fin with 11, pectoral fin with 14 or 15, pelvic fin with 8, anal fin with 13 or 14 and caudal fin with 19 rays. Ground color brown, dorsal regions darker than the ventral; dark-brown rounded blotch on opercle rounded blotch; dark-brown longitudinal band, from opercle to caudal-fin base. Dark-grey fins ( Graça, Pavanelli, 2007).

Maximum standard length. 260.0 mm ( Graça, Pavanelli, 2007).

Distribution. Río Orinoco, río Magdalena, Amazon and rio São Franciso basins, Paraná-Paraguay system and coastal rivers of Panamá and Northern South America ( Eschmeyer et al., 2017).

Remarks. Hoplerythrinus unitaeniatus  is a non-native species from the upper rio Paraná, and its occurrence can be associated with its introduction as a live bait by anglers, or with the filling of the Itaipu Reservoir and the consequent inundation of the Sete Quedas Falls.