perpendicularis, Simpsonichthys Costa [W. J. E. M.], Nielsen [D. T. B.] & de Luca [A. C.] 2001:26, Fig. [Aquarium (Brasil) v. 4 (no. 26); ref. 25934] Poça temporária perto do ribeirão do Salto, Estrada entre Itarantim e Jordânia, about 6 kilometers de Jordânia, bacia deo rio Jequitinhonha, Bahia, Brazil. Holotype: MZUSP 62570. Paratypes: MZUSP 62571 (5); UFRJ 5144-45 (10, 5). •Valid as Simpsonichthys perpendicularis Costa, Nielsen & de Luca 2001 -- (Costa in Reis et al. 2003:542 [ref. 27061], Costa 2004:6 [ref. 27569], Costa 2007:21 [ref. 29445], Costa & Lima 2010:205 [ref. 31041] in subgenus Ophthalmolebias). •Valid as Ophthalmolebias perpendicularis (Costa, Nielsen & de Luca 2001) -- (Silva et al. 2020:15 [ref. 37809], Vieira-Guimarães et al. 2024:55 [ref. 41258]). Current status: Valid as Ophthalmolebias perpendicularis (Costa, Nielsen & de Luca 2001). Rivulidae: Cynolebiinae. Distribution: South America: Jequitinhonha River basin, Bahia State (Brazil). Habitat: freshwater.