Astyanax nicaraguensis Eigenmann and Ogle 1907: 23

Angulo, Arturo, Naranjo-Elizondo, Beatriz, Rojas, Emmanuel & Ley-López, Juan Manuel, 2017, Fishes from the Tirimbina Biological Reserve, La Virgen de Sarapiquí, Heredia, Costa Rica, Check List 13 (5), pp. 683-702 : 687

(2) Astyanax nicaraguensis Eigenmann and Ogle 1907: 23 ; Nicaraguan tetra (En), Sardina (Sp)

Figure 2B

Astyanax aeneus ( Günther 1860) : 319—Angulo et al. (2013):991, in part.

Body elongate and moderately deep; snout length usually shorter than the eye diameter; both jaws of equal length, not enlarged; premaxillary teeth multicuspid, usually not enlarged; nape usually convex or straight; fins without strong spines; a single dorsal fin; adipose fin present, its base shorter than the base of the dorsal fin; caudal fin forked; general coloration white silvery, darker dorsally, usually greenish brown, and paler, usually pearl white, ventrally, with a gray lateral band; humeral blotch dark and vertically elongate; caudal blotch black and rhomboid, mainly on peduncle and caudal fin base; fins usually transparent with little dark pigment, in some specimens, the anal fin can be (partially) red, orange and/ or yellow; maximum body length ca 140 mm SL.