rivularis, Silurus Larrañaga [D. A.] 1923:376 [Escritos de Don Dámaso Antonio Larrañaga v. 2; ref. 22561] Río de La Plata or along the coast between Maldonado, Florianópolis, and Rio de Janeiro. Type catalog: Ferraris 2007:201 [ref. 29155], Koerber & Reis 2019:72 [ref. 37078]. Appeared as ribularis [apparently misspelled]; corresponds to Silurus 9-radiatus on p. 385. Appeared as Silurus rivularis vel 9-radiatus in Devincenzi 1925:322, 307 [ref. 20322]; Devincenzi treated as a synonym of Rhamdia quelen (Quoy & Gaimard 1824). Neotype designated by Silfvergrip 1996:35, 96 [ref. 22347]. Neotype designation invalid, Koerber & Reis 2020:5 [ref. 37463]. •Synonym of Rhamdia quelen (Quoy & Gaimard 1824) -- (Silfvergrip 1996:35, 96 [ref. 22347], Bockmann & Guazzelli in Reis et al. 2003:425 [ref. 27061] with question [but without question based on lectotype], Ferraris 2007:201 [ref. 29155] as ribularis, Koerber & Reis 2019:72 [ref. 37078] as ribularis). •Species inquiredae -- (Koerber & Reis 2020:8 [ref. 37463]). Nomen Dubium. Current status: Unknown. Heptapteridae: Rhamdiinae. Habitat: freshwater.