potamius, Stictorhinus Böhlke [J. E.] & McCosker [J. E.] 1975:5, Figs. 1-7 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 127 (no. 1); ref. 607] Freshwater pool of Rio Tocantin near Tucuruí, Pará, Brazil. Holotype: MZUSP 9248. Paratypes: ANSP 128520-21 (1, 8), 128522 [ex MZUSP 8980-81] (2); CAS 30473 (1, c&s), 30472 (8); GCRL-F-1571 (1); MZUSP 8959-79 (21), 9269-81 (13); USNM 212060 (2). Type catalog: Böhlke 1984:134 [ref. 13621], Smith 1994:37 [ref. 21917]. •Valid as Stictorhinus potamius Böhlke & McCosker 1975 -- (McCosker 1977:69 [ref. 6836], McCosker et al. 1989:326 [ref. 13288], Leiby in Smith 1989:855 [ref. 13285], Schmitter-Soto et al. 2000:149 [ref. 27754], Kullander in Reis et al. 2003:35 [ref. 27061], McCosker 2003:733 [ref. 26993], Menezes in Menezes et al. 2003:36 [ref. 27192], Rotundo et al. in Marceniuk et al. 2021:115 [ref. 38945], Lasso & Lasso-Alcalá in Lasso & Morales-Betancourt 2022:54 [ref. 40783]). Current status: Valid as Stictorhinus potamius Böhlke & McCosker 1975. Ophichthidae: Ophichthinae. Distribution: South America: Amazon River and Orinoco River basins and northeastern Brazil (Brazil and Venezuela). Habitat: freshwater, brackish.