Rineloricaria, 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 : 79

Rineloricaria sp.

Fig. 26

Body depressed; greatest body depth contained 9.9 and head depth 12.0 times in SL; head length 4.3, predorsal distance 2.8, dorsal-fin spine length 4.8 and pelvic-fin spine length 6.1 in SL; snout length contained 2.60, horizontal orbital diameter 8.7 and least interorbital width 4.1 times in HL. Mouth inferior; pre-maxilla and dentary with 6 teeth. Mid-lateral series with 28 plates. Dorsal fin with I,7, pectoral fin with I,6, pelvic fin with i,5 and anal with 6 rays. Ground color brownish; darkbrown transverse bars on flank. Hyaline fins with few dark-brown spots, sometimes forming irregular stripes ( Graça, Pavanelli, 2007).

Maximum standard length. 93.0 mm ( Graça, Pavanelli, 2007).

Distribution. Upper rio Paraná basin.

Remarks. Rineloricaria sp. is distinguished from the other two species from the upper rio Paraná, R. latirostris (Boulenger, 1900) and R. pentamaculata Langeani, Araújo, 1994 , by having conspicuous dark-brown spots and vermiculations on the head. Additionally, it is distinguished from R. pentamaculata by the absence of a naked area on the lateral corner of the snout (vs. presence; see Langeani, Araújo, 1994, fig. 2) and by a more acute snout. From R. latirostris (sensu Langeani, Araújo, 1994) , by having five thin, dark-brown transversal stripes on the dorsal portion of the body (vs. six, of which the third and the fourth or the fifth and the sixth may be fused to varying degrees, but in such case always forming a broad bar).

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.