Lophonema peccatonica (FOSSIL) (Sardeson, 1896 †)
Lophonema perstriata (FOSSIL) (Billings, 1859 †)
Helicotoma planulata (FOSSIL) Salter, 1859 †
Helicotoma planulatoides (FOSSIL) Ulrich & Scofield, 1897 †
Helicotoma proserpina (FOSSIL) Billings, 1865 †
Helicotoma robinsoni (FOSSIL) Rohr, 1988 †
Helicotoma robusta (FOSSIL) Ulrich & Scofield, 1897 †
Ophiletina shokoriense (FOSSIL) O. Kobayashi, 1930 †
Helicotoma similis (FOSSIL) R.P. Whitfield, 1890 †
Ophiletina sublaxa (FOSSIL) Ulrich & Scofield, 1897 †
Helicotoma subquadrata (FOSSIL) Ulrich & Scofield, 1897 †
Helicotoma superba (FOSSIL) E.F.R.K. Koken, 1897 †
Lophonema taneyensis (FOSSIL) (Cullison, 1944 †)
Helicotoma tennesseensis (FOSSIL) Safford, 1869 †
Lophonema tricarinata (FOSSIL) (Billings, 1859 †)
Helicotoma tritonia (FOSSIL) Billings, 1865 †
Helicotoma umbilicata (FOSSIL) Ulrich & Scofield, 1897 †
Helicotoma verticalis (FOSSIL) Ulrich & Scofield, 1897 †
Boucotspira visbeyensis (FOSSIL) (Lindstrom, 1884 †)
Helicotoma whiteavesiana (FOSSIL) W.J. Raymond, 1908 †
Boucotspira wisbyensis (FOSSIL) (Lindström, 1884 †)
Lophonema wuhuensis (FOSSIL) Endo, 1935 †