Acanthochaenus Gill, 1884 (original description)
Aleposomus Gill, 1884 accepted as Xenodermichthys Günther, 1878 (original description)
Derichthys Gill, 1884 (original description)
Ectoconus Cope, 1884 † (original description)
Euryops Cope, 1884 (original description)
Hexodon Cope, 1884 † (original description)
Liotomus Cope, 1884 † (original description)
Phlegmacera Packard, 1884 accepted as Sabacon Simon, 1879 (original description)
Plioprion Cope, 1884 † accepted as Bolodon Owen, 1871 † (original description)
Scorpionus Smith, 1884 accepted as Onychocerus Lepeletier & Audinet-Serville, 1830 (original description)
Stomatonema Fewkes, 1884 (original description)
Stomotonema Fewkes, 1884 (original description)
Trispondylus Cope, 1884 † accepted as Phenacodus Cope, 1873 † (original description)