Astyanax biotae Castro, Vari, 2004

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 : 26

Astyanax biotae Castro, Vari, 2004

Fig. 7

Body deep; greatest depth contained 2.4 to 2.9 and caudal peduncle depth 8.0 to 9.8 times in SL; head length 3.2 to 3.6, predorsal distance 1.8 to 1.9 and caudal peduncle length 10.6 to 11.2 in SL; snout length 4.1 to 4.9, horizontal orbital diameter 2.4 to 3.0 and least interorbital width 2.6 to 3.0 in HL. Mouth terminal; inner row of premaxilla with 5 teeth, outer with 4 or 5, dentary with 10-12, and maxilla with one tooth. Lateral line complete, with 33-35 pored scales; transverse series above lateral line with 6 or 7 scale rows and below with 4 or 5 scale rows. Dorsal fin with 11 rays, pectoral fin with 12 or 13, pelvic fin with 7 or 8, anal fin with 27-30, and caudal fin with 19 rays. Ground color silvery; silvery longitudinal band on flank (brown or grey in fixed specimens), from humeral blotch to median caudal-fin rays, larger on caudal peduncle, forming oval-shaped, horizontally elongated, blotch; flank scales with dark-brown border.

Maximum standard length. 41.3 mm.

Biological data. Feeds on arthropods, debris and seeds of vascular plants and filamentous algae ( Castro, Vari, 2004a).

Distribution. Upper rio Paraná basin.

Figures

Fig. 7. a. Astyanax biotae, NUP 15137, 44.1 mm SL, córrego Peroba, tributary of the rio Ivinheima, Jateí, State of Mato Grosso do Sul. b. Astyanax bockmanni, 67.2 mm SL, fresh specimen, uncat. c. Astyanax aff. fasciatus, NUP 32, 65.0 mm SL, rio Paraná, Porto Rico; d. Astyanax lacustris, 79.9 mm SL, fresh specimen, uncat. e. Astyanax aff. paranae, NUP 3045, 72.9 mm SL, ribeirão Lageado, Marechal Cândido Rondon, State of Paraná. f. Astyanax schubarti, MZUSP 17101, 68.4 mm SL, rio Jaguara-mirim, São Paulo.