dumerili, Apionichthys Kaup [J. J.] 1858:104 [Archiv für Naturgeschichte v. 24 (pt. 1); ref. 2578] Syntypes: BMNH 1927.4.27.1 [ex MNHN] (1); MNHN 0000-3214 (2), 0000-3216 (1). Type catalog: Desoutter et al. 2001:317 [ref. 25922]. •Valid as Apionichthys dumerili Kaup 1858 -- (Cervigón 1992:438 [ref. 23827], Cervigón 1996:18 [ref. 24489], Keith et al. 2000:252 [ref. 24547], Camargo & Isaac 2001:144 [ref. 27639], Ramos 2003:115 [ref. 26762], Munroe 2003:1930 [ref. 27118], Ramos in Reis et al. 2003:667 [ref. 27061], Ramos in Menezes et al. 2003:107 [ref. 27192], Marceniuk et al. 2017:42 [ref. 35324], see DoNascimiento et al. 2017:[25] [ref. 35679], Rotundo et al. in Marceniuk et al. 2021:400 [ref. 38945], Bitencourt et al. 2022:4 [ref. 39848], Koerber et al. 2022:68 [ref. 39235], Lasso & Lasso-Alcalá in Lasso & Morales-Betancourt 2022:290 [ref. 40783], Carvalho-Filho 2023:266 [ref. 40480]). Current status: Valid as Apionichthys dumerili Kaup 1858. Achiridae. Distribution: Widespread in South America: Venezuela to Maranhão (Brazil). Habitat: freshwater, brackish.