Loricariichthys, Bleeker in Bleeker, 1862

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 : 77

Loricariichthys

1. Snout short, contained 2.2 to 2.3 times in head length; orbital diameter contained 3.7 to 4.6 times in head length ..................................................................... L. platymetopon

1’. Snout elongated, contained 1.9 to 2 times in head length; orbital diameter contained 5.3 to 6.5 times in head length................................................................... L. rostratus

Loricariichthys platymetopon Isbrücker, Nijssen, 1979

Fig. 26

Body depressed; greatest body depth contained 10.0 to 11.9 and caudal peduncle depth 37.0 to 58.8 times in SL; head length 4.0 to 4.5, predorsal distance 2.9 to 3.2, dorsal-fin spine length 4.0 to 5.1, pectoral-fin spine length 5.5 to 7.0 and pelvic-fin spine length 5.6 to 6.3 in SL; snout length contained 2.2 to 2.3, horizontal orbital diameter 3.7 to 4.6 and least interorbital width 3.1 to 4.5 times in HL. Mouth inferior; pre-maxilla with 7-14 and dentary with 10- 20 teeth. Mid-lateral series with 31-32 plates. Dorsal fin with I,7, pectoral fin with I,6, pelvic fin with i,5 and anal with 6 rays ( Reis, Pereira, 2000). Ground color brownish; dark-brown blotches, sometimes forming irregular and transverse bars. Hyaline fins with few dark-brown spots ( Graça, Pavanelli, 2007).

Maximum standard length. 282.0 mm ( Graça, Pavanelli, 2007).

Distribution. Río de la Plata basin.

Remarks. Loricariichthys platymetopon is a non-native species from the upper rio Paraná, and its occurrence can be associated with the filling of the Itaipu Reservoir and the consequent inundation of the Sete Quedas Falls.

Figures

Fig. 26. a. Farlowella hahni, NUP 374, 130.0 mm SL, ribeirão São Pedro, São Pedro do Paraná, State of Paraná. b. Loricaria prolixa, 230.5 mm SL, uncat. c. Loricaria sp., NUP 2567, 230.5 mm SL, rio Paraná, Porto Rico, State of Paraná. d. Loricariichthys platymetopon, 210.0 mm SL, uncat. e. Loricariichthys rostratus, 250.0 mm SL, uncat. f. Rineloricaria sp., NUP 2565, 86.0 mm SL, riacho na Estrada (D. Armando), Santa Helena, State of Paraná.