agassizii, Tachisurus Eigenmann [C. H.] & Eigenmann [R. S.] 1888:145 [Proceedings of the California Academy of Sciences (Series 2) v. 1 (pt 2); ref. 1249] Rio Grande do Sul [probably erroneous], Brazil. Holotype (unique): MCZ 7670. Type catalog: Ferraris 2007:39 [ref. 29155]. Original genus should have been spelled Trachysurus. •Valid as Arius agassizii (Eigenmann & Eigenmann 1888) -- (Burgess 1989:168 [ref. 12860] as agassizi). •Valid as Cathorops agassizii (Eigenmann & Eigenmann 1888) -- (Camargo & Isaac 2001:145 [ref. 27639], Marceniuk & Ferraris in Reis et al. 2003:449 [ref. 27061], Marceniuk & Menezes in Menezes et al. 2003:42 [ref. 27192], Kailola 2004:132 [ref. 28108], Marceniuk 2005:97 [ref. 28718], Marceniuk & Menezes 2007:40 [ref. 29031] as agassizi, Ferraris 2007:39 [ref. 29155], Betancur-R. et al. 2007:349 [ref. 29268], Marceniuk 2007:368 [ref. 29509], Marceniuk & Betancur-R. 2008:42 [ref. 29576], Marceniuk et al. 2009:247 [ref. 30406], Marceniuk et al. 2012:91 [ref. 31865], Marceniuk et al. 2012:666 [ref. 32225], Marceniuk et al. 2016:138 [ref. 34763], Marceniuk et al. 2017:38 [ref. 35324], Marceniuk in Marceniuk et al. 2021:166 [ref. 38945], Carvalho-Filho 2023:73 [ref. 40480] as agassizi, Marceniuk et al. 2023:13 [ref. 40422], Lutz et al. 2024:8 [ref. 41548]). Current status: Valid as Cathorops agassizii (Eigenmann & Eigenmann 1888). Ariidae: Ariinae. Distribution: South America: French Guiana and north and northeastern Brazil (Brazil and French Guiana). Habitat: freshwater, brackish.