Rivulidae Myers 1925

Angulo, Arturo, Betts, Joel T., González-Alemán, Néstor J., Castañeda, Edgar, Berghe, Eric Van Den, Elías, Diego J., Mcmahan, Caleb D. & Matamoros, Wilfredo A., 2023, Continental fishes of Nicaragua: diversity, distribution and conservation status; with an annotated and illustrated checklist of species and an identification guide to families, Zootaxa 5376 (1), pp. 1-89 : 58

Family Rivulidae Myers 1925 ( Fig. 4F ). New World Rivulins; Killies, Saltones, Olominas

Description: Body elongate, cylindrical; up to 20 cm, usually less than 8 cm; mouth short, wide, terminal to superior; eyes relatively large; head flattened; pelvic fins located on the belly; lateral line incomplete, underdeveloped; dorsal fin posterior, usually behind the origin of the anal fin; caudal fin usually rounded (Nelson et al. 2016, Angulo et al. 2021). Distribution: Freshwater (rarely brackish); southern Florida through much of Central America to Uruguay and northeastern Argentina (Nelson et al. 2016). One genus and one species in Nicaraguan freshwaters.

Figures

FIGURE 4. Families of continental fishes of Nicaragua, part 3; Achiridae (A), Carangidae (B), Cichlidae (C), Pomacentridae (D), Atherinopsidae (E), Rivulidae (F), Poeciliidae (G), Anablepidae (H), Belonidae (I), Hemiramphidae (J), Mugilidae (K), Gobiesocidae (L), Dactyloscopidae (M) and Lutjanidae (N). Illustrations adapted (with permission) from Nelson et al. (2016) and Angulo et al. (2021).