Lophonema abrupta (FOSSIL) (Billings, 1859 †)
Ophiletina angularis (FOSSIL) Ulrich & Scofield, 1897 †
Boucotspira antelopensis (FOSSIL) (Rohr, 1996 †)
Burdikinia axionoides (FOSSIL) (R. Etheridge jr.,1921 †)
Helicotoma blodgetti (FOSSIL) Rohr, 1988 †
Helicotoma brocki (FOSSIL) Foerste, 1912 †
Ophiletina bromidensis (FOSSIL) (Rohr & Johns, 1990 †)
Burdikinia burdekinensis (FOSSIL) (R. Etheridge jr.,1917 †)
Lophonema calphurnia (FOSSIL) (Billings, 1865 †)
Amphelissa carinatum (FOSSIL) Heidecker, 1959 †
Boucotspira carinifer (FOSSIL) (E.F.R.K. Koken, 1896 †)
Lophonema circumlirata (FOSSIL) (R.P. Whitfield, 1886 †)
Lophonema costata (FOSSIL) Kobayashi, 1959 †
Helicotoma declivis (FOSSIL) Safford, 1869 †
Ophiletina fausta (FOSSIL) (Sardeson, 1896 †)
Boucotspira fimbriata (FOSSIL) Rohr, 1980 †
Lophonema frydai (FOSSIL) Rohr, 1994 †
Palaeomphalus glabra (FOSSIL) E.F.R.K. Koken& J. Perner, 1925 †
Helicotoma gorgonea (FOSSIL) Billings, 1865 †
Helicotoma granosa (FOSSIL) Ulrich & Scofield, 1897 †
Helicotoma griffinorum (FOSSIL) Rohr, 1980 †
Amphelissa isisensis (FOSSIL) R. Etheridge jr., 1921 †
Helicotoma kanekoi (FOSSIL) T. Kobayashi, 1931 †
Boucotspira lamellosa (FOSSIL) (Lindström, 1884 †)
Helicotoma marginata (FOSSIL) Ulrich & Scofield, 1897 †
Helicotoma miser (FOSSIL) Billings, 1865 †
Helicotoma missouriensis (FOSSIL) R.M. Branson, 1909 †
Palaeomphalus obtusangulus (FOSSIL) (Angelin & Lindström,1880 †)
Palaeomphalus olsoni (FOSSIL) Rohr, 1980 †
Boucotspira ordovicia (FOSSIL) (Longst, 1924 †)
Helicotoma oriens (FOSSIL) J. Perner, 1903 †
Lophonema orientalia (FOSSIL) Yü, 1961 †
Vivianella ornata (FOSSIL) (E.F.R.K. Koken, 1896 †)
Boucotspira ozawai (FOSSIL) (O. Kobayashi, 1930 †)
Helicotoma patula (FOSSIL) Lamont †