Seimkanites aculeatus (FOSSIL) (Bychkov, 1976 †)
Asklepioceras altilis (FOSSIL) Tozer, 1994 †
Eoprotrachyceras americanum (FOSSIL) (Mojsisovics, 1882 †)
Anolcites anguinus (FOSSIL) Tozer, 1994 †
Anolcites angustus (FOSSIL) Tozer, 1994 †
Sympolycyclus antiquus (FOSSIL) Tozer, 1994 †
Trachyceras aon (FOSSIL) (Münster, 1834 †)
Trachyceras aonoides (FOSSIL) Mojsisovics, 1882 †
Frankites apertus (FOSSIL) (Mojsisovics, 1893 †)
Protrachyceras archelaus (FOSSIL) (Laube †)
Neoprotrachyceras attila (FOSSIL) (Mojsisovics, 1893 †)
Otoarpadites auritus (FOSSIL) Tozer, 1994 †
Pterosirenites auritus (FOSSIL) Tozer, 1980 †
Meginoceras aylardi (FOSSIL) McLearn, 1947 †
Neoprotrachyceras baconicum (FOSSIL) (Mojsisovics, 1870 †)
Silenticeras bamberi (FOSSIL) Tozer, 1994 †
Anolcites barberi (FOSSIL) Smith, 1914 †
Zestoceras barwicki (FOSSIL) (Johnson, 1941 †)
Sirenites betulinus (FOSSIL) (Dittmar, 1886 †)
Trachyceras bipunctatum (FOSSIL) (Münster, 1841 †)
Anasirenites briseis (FOSSIL) Mojsisovics, 1893 †
Brotheotrachyceras brotheus (FOSSIL) (Münster, 1834 †)
Pseudosirenites bullatus (FOSSIL) Tozer, 1994 †
Daxatina canadensis (FOSSIL) (J.J.F. Whiteaves,1889 †)
Trachyceras canadensis (FOSSIL) (Laube 1869 †)
Arctosirenites canadensis (FOSSIL) Tozer, 1961 †
Meginoceras caurinum (FOSSIL) McLearn, 1947 †
Arctosirenites columbianus (FOSSIL) Tozer, 1994 †
Arctoarpadites costatus (FOSSIL) (Tozer, 1961 †)
Protrachyceras costulatum (FOSSIL) Mansuy, 1912 †
Anasirenites crassicrenulatus (FOSSIL) Lukeneder & Lukeneder,2014 †
Eoprotrachyceras curionii (FOSSIL) (Mojsisovics, 1882 †)
Muensterites delicatulus (FOSSIL) McLearn, 1947 †
Protrachyceras deprati (FOSSIL) Mansuy, 1912 †
Trachyceras desatoyense (FOSSIL) Johnston, 1941 †