trigintaoctoradiatus, Silurus Larrañaga [D. A.] 1923:386 [Escritos de Don Dámaso Antonio Larrañaga v. 2; ref. 22561] Uruguay. No types known. Type catalog: Ferraris 2007:70 [ref. 29155]. Originally as Silurus 38-radiatus. Corresponds to Silurus imberbis on p. 376. Appeared as Silurus imberbis vel 38-radiatus in Devincenzi 1925:310, 322 [ref. 20322]; Devincenzi treated as a synonym of Ageneiosus ucayalensis Castelnau 1855. •Synonym of Ageneiosus militaris Valenciennes 1835 -- (Ferraris 2007:70 [ref. 29155], Litz & Koerber 2014:18 [ref. 33622], Mirande & Koerber 2015:30 [ref. 35117]). Current status: Synonym of Ageneiosus militaris Valenciennes 1835. Auchenipteridae: Auchenipterinae. Habitat: freshwater.