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Genus: Amphelissa Etheridge, Jr., 1921 † (DB: 2 SP)
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Amphelissa carinatum
Heidecker, 1959 † (FOSSIL)
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Amphelissa isisensis
R. Etheridge jr., 1921 † (FOSSIL)
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Genus: Boucotspira Rohr, 1980 † (DB: 8 SP)
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Boucotspira antelopensis
(Rohr, 1996 †) (FOSSIL)
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Trochonemella antelopensis Rohr, 1996 † =» Boucotspira antelopensis
(Rohr, 1996 †)
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Boucotspira carinifer
(E.F.R.K. Koken, 1896 †) (FOSSIL)
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Euomphalus carinifer E.F.R.K. Koken, 1896 † =» Boucotspira carinifer
(E.F.R.K. Koken, 1896 †)
-
Euomphalopterus cariniferus E.F.R.K. Koken, 1896 † =» Boucotspira carinifer
(E.F.R.K. Koken, 1896 †)
-
Boucotspira fimbriata
Rohr, 1980 † (FOSSIL)
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Boucotspira lamellosa
(Lindström, 1884 †) (FOSSIL)
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Trochus lamellosus Lindström, 1884 † =» Boucotspira lamellosa
(Lindström, 1884 †)
-
Trochonema lamellosus Lindström, 1884 † =» Boucotspira lamellosa
(Lindström, 1884 †)
-
Streptotrochus lamellosus Lindström, 1884 † =» Boucotspira lamellosa
(Lindström, 1884 †)
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Boucotspira ordovicia
(Longst, 1924 †) (FOSSIL)
-
Boucotspira ordovica Longst, 1924 † =» Boucotspira ordovicia
(Longst, 1924 †)
-
Euomphalopterus ordovicius Longst, 1924 † =» Boucotspira ordovicia
(Longst, 1924 †)
-
Euomphalopterus ordovicus Longst, 1924 † =» Boucotspira ordovicia
(Longst, 1924 †)
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Boucotspira ozawai
(O. Kobayashi, 1930 †) (FOSSIL)
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Trochonema ozawai Kobayashi, 1930 † =» Boucotspira ozawai
(O. Kobayashi, 1930 †)
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Boucotspira visbeyensis
(Lindstrom, 1884 †) (FOSSIL)
-
Streptotrochus visbeyensis Lindstrom, 1884 † =» Boucotspira visbeyensis
(Lindstrom, 1884 †)
-
Boucotspira wisbyensis
(Lindström, 1884 †) (FOSSIL)
-
Trochus wisbyensis Lindström, 1884 † =» Boucotspira wisbyensis
(Lindström, 1884 †)
-
Genus: Burdikinia Knight, 1937 † (DB: 2 SP)
-
Burdikinia axionoides
(R. Etheridge jr., 1921 †) (FOSSIL)
-
Burdikinia burdekinensis
(R. Etheridge jr., 1917 †) (FOSSIL)
-
Genus: Helicotoma Salter, 1859 † (DB: 25 SP)
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Helicotoma blodgetti
Rohr, 1988 † (FOSSIL)
-
Helicotoma brocki
Foerste, 1912 † (FOSSIL)
-
Helicotoma declivis
Safford, 1869 † (FOSSIL)
-
Helicotoma gorgonea
Billings, 1865 † (FOSSIL)
-
Helicotoma granosa
Ulrich & Scofield, 1897 † (FOSSIL)
-
Helicotoma griffinorum
Rohr, 1980 † (FOSSIL)
-
Helicotoma kanekoi
T. Kobayashi, 1931 † (FOSSIL)
-
Helicotoma marginata
Ulrich & Scofield, 1897 † (FOSSIL)
-
Helicotoma miser
Billings, 1865 † (FOSSIL)
-
Helicotoma missouriensis
R.M. Branson, 1909 † (FOSSIL)
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Helicotoma oriens
J. Perner, 1903 † (FOSSIL)
-
Helicotoma patula
Lamont † (FOSSIL)
-
Helicotoma planulata
Salter, 1859 † (FOSSIL)
-
Helicotoma planulata muricata
Salter, 1859 † (FOSSIL)
-
Helicotoma planulata robusta
Salter, 1859 † (FOSSIL)
-
Helicotoma planulatoides
Ulrich & Scofield, 1897 † (FOSSIL)
-
Helicotoma proserpina
Billings, 1865 † (FOSSIL)
-
Helicotoma robinsoni
Rohr, 1988 † (FOSSIL)
-
Helicotoma robusta
Ulrich & Scofield, 1897 † (FOSSIL)
-
Helicotoma similis
R.P. Whitfield, 1890 † (FOSSIL)
-
Helicotoma subquadrata
Ulrich & Scofield, 1897 † (FOSSIL)
-
Helicotoma superba
E.F.R.K. Koken, 1897 † (FOSSIL)
-
Helicotoma tennesseensis
Safford, 1869 † (FOSSIL)
-
Helicotoma tritonia
Billings, 1865 † (FOSSIL)
-
Helicotoma umbilicata
Ulrich & Scofield, 1897 † (FOSSIL)
-
Helicotoma verticalis
Ulrich & Scofield, 1897 † (FOSSIL)
-
Helicotoma whiteavesiana
W.J. Raymond, 1908 † (FOSSIL)
-
Genus: Lophonema Purdue & Miser, 1916 † (DB: 11 SP)
-
Lophonema abrupta
(Billings, 1859 †) (FOSSIL)
-
Trochonema abruptum Billings, 1859 † =» Lophonema abrupta
(Billings, 1859 †)
-
Lophonema calphurnia
(Billings, 1865 †) (FOSSIL)
-
Lophonema circumlirata
(R.P. Whitfield, 1886 †) (FOSSIL)
-
Euomphalus circumliratus R.P. Whitfield, 1886 † =» Lophonema circumlirata
(R.P. Whitfield, 1886 †)
-
Lophonema costata
Kobayashi, 1959 † (FOSSIL)
-
Lophonema frydai
Rohr, 1994 † (FOSSIL)
-
Lophonema orientalia
Yü, 1961 † (FOSSIL)
-
Lophonema peccatonica
(Sardeson, 1896 †) (FOSSIL)
-
Lophonema perstriata
(Billings, 1859 †) (FOSSIL)
-
Lophonema taneyensis
(Cullison, 1944 †) (FOSSIL)
-
Polhemia taneyensis Cullison, 1944 † =» Lophonema taneyensis
(Cullison, 1944 †)
-
Lophonema tricarinata
(Billings, 1859 †) (FOSSIL)
-
Trochonema tricarinatum Billings, 1859 † =» Lophonema tricarinata
(Billings, 1859 †)
-
Lophonema wuhuensis
Endo, 1935 † (FOSSIL)
-
Genus: Ophiletina Ulrich & Scofield, 1897 † (DB: 5 SP)
-
Ophiletina angularis
Ulrich & Scofield, 1897 † (FOSSIL)
-
Ophiletina bromidensis
(Rohr & Johns, 1990 †) (FOSSIL)
-
Oriostoma bromidensis Rohr & Johns, 1990 † =» Ophiletina bromidensis
(Rohr & Johns, 1990 †)
-
Ophiletina fausta
(Sardeson, 1896 †) (FOSSIL)
-
Ophileta fausta Sardeson, 1896 † =» Ophiletina fausta
(Sardeson, 1896 †)
-
Ophiletina shokoriense
O. Kobayashi, 1930 † (FOSSIL)
-
Ophiletina sublaxa
Ulrich & Scofield, 1897 † (FOSSIL)
-
Genus: Palaeomphalus Koken & Perner, 1925 † (DB: 3 SP)
-
Palaeomphalus glabra
E.F.R.K. Koken & J. Perner, 1925 † (FOSSIL)
-
Palaeomphalus obtusangulus
(Angelin & Lindström, 1880 †) (FOSSIL)
-
Palaeomphalus gradatus E.F.R.K. Koken, 1896 † =» Palaeomphalus obtusangulus
(Angelin & Lindström, 1880 †)
-
Palaeomphalus immigratus E.F.R.K. Koken & J. Perner, 1925 † =» Palaeomphalus obtusangulus
(Angelin & Lindström, 1880 †)
-
Euomphalus laminosus Angelin & Lindström, 1880 † =» Palaeomphalus obtusangulus
(Angelin & Lindström, 1880 †)
-
Palaeomphalus laminosus E.F.R.K. Koken, 1897 † =» Palaeomphalus obtusangulus
(Angelin & Lindström, 1880 †)
-
Euomphalus obtusangulus Angelin & Lindström, 1880 † =» Palaeomphalus obtusangulus
(Angelin & Lindström, 1880 †)
-
Palaeomphalus olsoni
Rohr, 1980 † (FOSSIL)
-
Genus: Vivianella Cox, 1958 † (DB: 1 SP)
-
Vivianella ornata
(E.F.R.K. Koken, 1896 †) (FOSSIL)
-
Viviana ornata E.F.R.K. Koken, 1896 † =» Vivianella ornata
(E.F.R.K. Koken, 1896 †)
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