Characidium gomesi Travassos, 1956

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 : 42-43

Characidium gomesi Travassos, 1956

Fig. 12

Body elongated; greatest body depth contained 3.9 to 4.0 and caudal peduncle depth 7.8 to 8.5 times in SL; head length 4.2, predorsal distance 2.1 to 2.4 and caudal peduncle length 4.9 to 6.0 in SL; snout length 3.8 to 3.9, horizontal orbital diameter 4.4 to 4.8 and least interorbital width 5.3 to 5.9 in HL. Mouth terminal; premaxilla with 6 or 7, dentary with 8-10 and maxilla with no teeth. Isthmus without scales. Lateral line with 34 or 35 pored scales; transverse series above lateral line with 4 scale rows and below with 2 or 2½ scale rows. Dorsal fin with 11 rays, pectoral fin with 11-13 rays, pelvic fin and anal fin with 8 or 9 rays, and caudal fin with 18 rays. Ground color brown; three dark-brown longitudinal stripes on dorsal region of body; dark-brown stripe from tip of snout to orbit; dark-brown longitudinal stripe on flank, from humeral spot caudal peduncle; darkbrown transverse bars on flank, conspicuous on caudal peduncle; dark-brown spot at base of median caudal-fin rays. Hyaline fins; dorsal fin with two dark-brown oblique stripes; adipose fin with distal portion darkened; posterior half of pectoral, pelvic and anal-fin rays darkened; caudal fin with two dark-brown transverse bars.

Maximum standard length. 56.0 mm.

Biological data. Feeding habit omnivorous with tendency to insectivory, and lives in rocks bottom with stronger current ( Ferreira, 2007).

Distribution. Upper rio Paraná basin.

Figures

Fig. 12. a. Characidium gomesi, NUP 17607, 59.3 mm SL, córrego São Lucas, tributary of the rio Amambaí, Juti, State of Mato Grosso do Sul. b. Characidium aff. zebra, 56.0 mm SL, uncat. c. Characidium sp., NUP 3450, 27.4 mm SL, lagoa da Esperança, Nova Alvorada do Sul, State of Mato Grosso do Sul. d. Cyphocharax modestus, NUP 3290, 80.0 mm SL, lagoa do Bilunga, Taquarussu, State of Mato Grosso do Sul. e. Cyphocharax nagelii, 130.0 mm SL, uncat. f. Steindachnerina brevipinna, 105.8 mm SL, fresh specimen, uncat. g. Steindachnerina insculpta, NUP 1424, 90.0 mm SL, Itaipu Reservoir, Guaíra, State of Paraná. h. Rhaphiodon vulpinus, 480.0 mm SL, fresh specimen, uncat.