Hoplias misionera Rosso, Mabragaña, González-Castro, Delpiani, Avigliano, Schenone, Días de Astarloa, 2016

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 : 48

Hoplias misionera Rosso, Mabragaña, González-Castro, Delpiani, Avigliano, Schenone, Días de Astarloa, 2016

Fig. 13

Body elongated; greatest depth contained 3.4 to 4.9, caudal peduncle depth 5.9 to 8.3 times in SL; head length 2.9 to 3.3, predorsal distance 1.8 to 2.1 and caudal peduncle length 7.1 to 10.0; snout length 3.4 to 4.9, horizontal orbital diameter 3.6 to 6.8 and least interorbital width 2.9 to 4.6 in HL. Mouth terminal; premaxilla with 10; dentary with 2 rows of teeth, outer row with 10 or 11 and inner row with 14- 16; maxilla with 30-49 teeth. Lateral line with 39-43 pored scales; series between lateral lines with 11-13 scale rows. Dorsal fin with 14-16, pectoral fin with 11-14, pelvic fin with 8 or 9, anal fin with 9-11 and caudal fin with 19 rays ( Bifi, 2013; Rosso et al., 2016). Ground color pale brown; darkbrown longitudinal band, from opercle to caudal peduncle. Some specimens with dark-brown stripes radiating ventrally and posteriorly from orbit through infraorbitals; ventral surface of dentary with light-beige stripes alternating with dark-brown stripes. Fins dark-brown spots, forming darkbrown irregular stripes.

Maximum standard length. 290.5 mm.

Distribution. Río de la Plata system.

Remarks. Hoplias misionera has been captured in the upper rio Paraná floodplain since 2008 by the Nupélia staff. Additionally, Bifi (2013), in a revisionary study of the H. malabaricus species group from the río de la Plata basin, provided further useful diagnostic features for this species (identified as Hoplias sp. D). Hoplias misionera is a non-native species from the upper rio Paraná, and its 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).

Figures

Fig. 13. a. Erythrinus erythrinus, NUP 16220, 77.4 mm SL, córredo da Ponte, Mundo Novo, State of Mato Grosso do Sul. b. Hoplerythrinus unitaeniatus, NUP 3437, 150.2 mm SL, lagoa Bilunguinha, Taquarussu, State of Mato Grosso do Sul. c. Hoplias intermedius, MZUSP 69370, 277.2 mm SL, rio Suaçuí Pequeno, downstream from the bridge of Procópio, Coroaci, Minas Gerais State. d. Hoplias mbigua, NUP 292, 260.0 mm SL, Itaipu Reservoir, Santa Helena, State of Paraná. e. Hoplias misionera, NUP 10408, 190.0 mm SL, lagoa Pousada das Graças, Taquarussu, State of Mato Grosso do Sul. f. Hoplias sp. 2, NUP 3457, 250.0 mm SL, ressaco do Leopoldo (ilha Mutum), Batayporã, State of Mato Grosso do Sul. g. Hoplias sp. 3, NUP 3458, 170.0 mm SL, ressaco do Leopoldo (ilha Mutum), Batayporã, State of Mato Grosso do Sul. h. Hemiodus orthonops, 137.0 mm SL, uncat.