Orecopia murrayi (FOSSIL) Tassell, 1978 †
Labrocuspis nodosa (FOSSIL) Heidecker, 1959 †
Omphalotrochus obtusispira (FOSSIL) (Shumard, 1859 †)
Pseudomphalotrochus philosophus (FOSSIL) (Whidborne, 1889 †)
Orecopia priscum (FOSSIL) (Schlotheim, 1820 †)
Trochonemopsis rectilatera (FOSSIL) (J.W. Hall& R.P. Whitfield, 1872 †)
Coronopsis regularis (FOSSIL) C.O. Waterhouse, 1963 †
Bassotrochus serpenteus (FOSSIL) (Talent, 1963 †)
Archaeosphera simbergi (FOSSIL) Heidelberger, 2001 †
Sylvestria soetenichensis (FOSSIL) (Kirchner, 1915 †)
Omphalotrochus spinosus (FOSSIL) E.L. Yochelson, 1956 †
Cinclidonema texanum (FOSSIL) Knight, 1945 †
Babylonites turritus (FOSSIL) E.L. Yochelson, 1956 †
Coronopsis vagrans (FOSSIL) C.O. Waterhouse, 1963 †
Archaeosphera wachtbergi (FOSSIL) (Kirchner, 1915 †)
Omphalotrochus whitneyi (FOSSIL) F.B. Meek, 1864 †
Pseudomphalotrochus winnipegosis (FOSSIL) (E.G. Linsley& E.L. Yochelson, 1973 †)
Omphalotrochus wolfcampensis (FOSSIL) E.L. Yochelson, 1956 †
Trochonemopsis yandellana (FOSSIL) (J.W. Hall& R.P. Whitfield, 1872 †)
Sylvestria zimmermanni (FOSSIL) Heidelberger & Koch,2005 †