Pimelodus microstoma Steindachner, 1877

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 : 84

Pimelodus microstoma Steindachner, 1877

Fig. 29

Body deep; greatest body depth contained 4.1 to 5.2 times in SL; head length 3.5 to 3.9, anal-fin base length 7.5 to 11.7, adipose-fin base length 3.5 to 3.9, maxillary-barbel length 1.0 to 1.2 in SL; snout length 2.0 to 2.2, horizontal orbital diameter 3.8 to 5.1, and least interorbital width 4.0 to 6.0 in HL; orbital diameter 0.9 to 1.5 times in interorbital width. Mouth terminal; dentigerous tooth plates in both premaxilla and dentary. Dorsal fin with I,6, pectoral fin with 12-15, pelvic fin with 6, and anal fin with 11-14 rays ( Azpelicueta, 2001). Ground color greyish; eight or nine dark-brown longitudinal series of spots. Light-brown fins with few dark-brown spots, occasionally inconspicuous.

Maximum standard length. 190.0 mm.

Distribution. Upper rio Paraná basin.

Remarks. Pimelodus microstoma was identified as P. heraldoi by Graça, Pavanelli (2007). Ribeiro, Lucena (2010) proposed P. heraldoi as a junior-synonym of P. microstoma .

Figures

Fig. 29. a. Pimelodus maculatus, NUP 12783, 214.4 mm SL, lagoa da Onça, Batayporã, State of Mato Grosso do Sul. b. Pimelodus microstoma, NUP 18158, 117.6 mm SL, rio Azul, Palotina, State of Paraná. c. Pimelodus mysteriosus, NUP 10824, 158.0 mm SL, lagoa do Guaraná, tributary of the rio Baía, Taquarussu, State of Mato Grosso do Sul. d. Pimelodus ornatus, 208.0 mm SL, fresh specimen, uncat. e. Pimelodus paranaensis, 168.0 mm SL, uncat.