Rineloricaria, Bleeker in Bleeker, 1862

Rineloricaria View in CoL View at ENA sp.

Fig. 26 View Fig

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).