Family Arapaimidae Bonaparte 1846

Arapaimini Bonaparte 1846:5 [ref. 519] (subfamily) Arapaima [genus inferred from the stem, Article 11.7.1.1; family name sometimes seen as Arapaimatidae]

Heterotidae Cope 1871:455 [ref. 920] (family) Heterotis [genus inferred from the stem, Article 11.7.1.1; stem corrected to Heterotid- by Gill 1893b:130 [ref. 26255], confirmed by Steyskal 1980:170 [ref. 14191]]

Clupisudidae Jordan 1923a:123 [ref. 2421] (family) Clupisudis