Cephalopoda Cuvier, 1797
Anapachydiscus Yabe & Shimizu, 1926
Baskaniceras Wright & Kennedy, 1984
Canadoceras Spath, 1922
Eupachydiscus Spath, 1922
Lewesiceras Spath, 1939
Menuites Spath, 1922
Nowakites Spath, 1922
Parapachydiscus Hyatt, 1900
