nicaraguensis, Astyanax rutilus Eigenmann [C. H.] & Ogle [F.] 1907:23 [Proceedings of the United States National Museum v. 33 (no. 1556); ref. 1266] Nicaragua [probably the Atlantic versant] . Holotype: USNM 55653. Paratypes: CAS 39491 [ex USNM 55657 and IU 11486] (4), USNM 55657 (32). Type catalog: Vari & Howe 1991:7 [ref. 19022]. •Synonym of Astyanax aeneus (Günther 1860) -- (Bussing 1998:83 [ref. 24179]). •Valid as Astyanax nicaraguensis Eigenmann & Ogle 1907 -- (Buckup in Reis et al. 2003:111 [ref. 27061], Marinho & Birindelli 2013:46 [ref. 32569], Marinho & Ohara 2013:476 [ref. 32713], Schmitter-Soto 2016:130 [ref. 34424], Schmitter-Soto 2017:1393 [ref. 35414], Angulo et al. 2018:[17] [ref. 35879], Angulo et al. 2023:23 [ref. 40676]). Current status: Valid as Astyanax nicaraguensis Eigenmann & Ogle 1907. Acestrorhamphidae: Acestrorhamphinae. Distribution: Central America: Matagalpa, Atlantic slope (Nicaragua), through Costa Rica to the Sixaola River. Habitat: freshwater.