Esox tararira Larrañaga, 1923 accepted as Hoplias malabaricus (Bloch, 1794) (original description)
Falconeria aptera Larrañaga, 1923 accepted as Synbranchus marmoratus Bloch, 1795 (original description)
Falconeria pinnata Larrañaga, 1923 accepted as Synbranchus marmoratus Bloch, 1795 (original description)
Labrus amarus Larrañaga, 1923 accepted as Crenicichla scottii (Eigenmann, 1907) (original description)
Perca argentea Larrañaga, 1923 accepted as Cynoscion striatus (Cuvier, 1829) (original description)
Perca mollis Larrañaga, 1923 accepted as Macrodon atricauda (Günther, 1880) (original description)
Perca vigintiuniradiata Larrañaga, 1923 accepted as Cynoscion striatus (Cuvier, 1829) (original description)
Raia rhombus Larrañaga, 1923 accepted as Myliobatis aquila (Linnaeus, 1758) (original description)
Salmo auratus Larrañaga, 1923 accepted as Salminus brasiliensis (Cuvier, 1816) (original description)
Salmo novemradiatus Larrañaga, 1923 accepted as Prochilodus lineatus (Valenciennes, 1837) (original description)
Salmo trigintaradiatus Larrañaga, 1923 accepted as Mylossoma duriventre (Cuvier, 1818) (original description)
Salmo vigintiseptemradiatus Larrañaga, 1923 accepted as Salminus brasiliensis (Cuvier, 1816) (original description)
Silurus armatus Larrañaga, 1923 accepted as Pterodoras granulosus (Valenciennes, 1821) (original description)
Silurus duodecimradiatus Larrañaga, 1923 accepted as Pterodoras granulosus (Valenciennes, 1821) (original description)
Silurus imberbis Larrañaga, 1923 accepted as Ageneiosus militaris Valenciennes, 1835 (original description)
Silurus macrocephalus Larrañaga, 1923 accepted as Pseudoplatystoma corruscans (Spix & Agassiz, 1829) (original description)
Silurus marinus Larrañaga, 1923 accepted as Genidens barbus (Lacepède, 1803) (original description)
Silurus muticus Larrañaga, 1923 accepted as Pimelodus albicans (Valenciennes, 1840) (original description)
Silurus pati Larrañaga, 1923 accepted as Luciopimelodus pati (Valenciennes, 1835) (original description)
Silurus quadricostatus Larrañaga, 1923 accepted as Hoplisoma paleatum (Jenyns, 1842) (original description)
Silurus rivularis Larrañaga, 1923 accepted as Rhamdia quelen (Quoy & Gaimard, 1824) (original description)
Silurus septemradiatus Larrañaga, 1923 (original description)
Silurus sexdecimradiatus Larrañaga, 1923 accepted as Genidens barbus (Lacepède, 1803) (original description)
Silurus trigintaoctoradiatus Larrañaga, 1923 accepted as Ageneiosus militaris Valenciennes, 1835 (original description)
Silurus undecimradiatus Larrañaga, 1923 accepted as Luciopimelodus pati (Valenciennes, 1835) (original description)
Sparus sargo Larrañaga, 1923 accepted as Diplodus argenteus (Valenciennes, 1830) (original description)
Squalus lixa Larrañaga, 1923 accepted as Carcharias taurus Rafinesque, 1810 (original description)
Syngnathus caballus Larrañaga, 1923 accepted as Hippocampus erectus Perry, 1810 (original description)