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Mollusca (132 791)
Subphylum Aculifera
Subphylum Conchifera
Subphylum Placophora accepted as Polyplacophora
Superclass Aplacophora
Class Amphineura accepted as Aculifera
Class Bivalvia (25 009)
Class Caudofoveata (143)
Class Cephalopoda (1 834)
Class Conchifera accepted as Bivalvia
Class Cricoconarida † (1)
Class Gastropoda (102 697)
Subclass Amphigastropoda † (390)
Subclass Angiogastropoda represented as Gastropoda
Subclass Apogastropoda
Subclass Caenogastropoda (53 636)
Subterclass Sorbeoconcha (147)
Superorder Hypsogastropoda
Order Architaenioglossa (4 918)
Order Caenogastropoda incertae sedis (7 676)
Order Littorinimorpha (17 179)
Superfamily Calyptraeoidea Lamarck, 1809 (203)
Family Calyptraeidae Lamarck, 1809 (203)
Genus Bicatillus Swainson, 1840 † (2)
Genus Bostrycapulus Olsson & Harbison, 1953 (10)
Genus Calyptraea Lamarck, 1799 (30)
Genus Calyptrea [sic] accepted as Calyptraea Lamarck, 1799
Genus Calyptropsis Tate, 1893 † (3)
Genus Clypeola J. E. Gray, 1868 accepted as Sigapatella R. P. Lesson, 1831
Genus Crepidula Lamarck, 1799 (65)
Genus Crepipatella R. P. Lesson, 1831 (9)
Genus Crucibulum Schumacher, 1817 (21)
Genus Crypta J. E. Gray, 1847 accepted as Crepidula Lamarck, 1799
Genus Desmaulus Rehder, 1943 (3)
Genus Dispotaea Say, 1824 accepted as Crucibulum Schumacher, 1817
Genus Ergaea H. Adams & A. Adams, 1854 (1)
Genus Galerus Gray, 1847 accepted as Calyptraea Lamarck, 1799
Genus Garnotia Gray, 1857 accepted as Crepidula Lamarck, 1799
Species Garnotia adunca (G. B. Sowerby I, 1825) accepted as Crepidula adunca G. B. Sowerby I, 1825
Species Garnotia naticarum (M. B. Williamson, 1905) accepted as Crepidula naticarum M. B. Williamson, 1905
Species Garnotia norissiarum (M. B. Williamson, 1905) accepted as Crepidula norrisiarum M. B. Williamson, 1905
Species Garnotia solida (Hinds, 1844) accepted as Crepidula adunca G. B. Sowerby I, 1825
Genus Grandicrepidula J. H. McLean, 1995 (5)
Genus Lysis Gabb, 1864 † (1)
Genus Maoricrypta H. J. Finlay, 1926 (11)
Genus Mitrella Gray, 1868 accepted as Calyptraea Lamarck, 1799
Genus Mitrula Gray, 1821 accepted as Calyptraea Lamarck, 1799
Genus Noicia Gray, 1868
Genus Sigapatella R. P. Lesson, 1831 (33)
Genus Siphonipatella Agassiz, 1847 accepted as Syphopatella R. P. Lesson, 1831
Genus Siphopatella [sic] accepted as Syphopatella R. P. Lesson, 1831
Genus Spirogalerus H. J. Finlay & Marwick, 1937 † accepted as Sigapatella R. P. Lesson, 1831
Genus Syphopatella R. P. Lesson, 1831 accepted as Crepidula Lamarck, 1799
Genus Taimyroconus Guzhov, 2015 † (1)
Genus Thylacus Conrad, 1860 † (1)
Genus Trochatella R. P. Lesson, 1831 accepted as Trochita Schumacher, 1817
Genus Trochilla Swainson, 1835 accepted as Trochita Schumacher, 1817
Genus Trochita Schumacher, 1817 (7)
Genus Verticumbo S. S. Berry, 1940 † accepted as Crepipatella R. P. Lesson, 1831
Genus Zeacrypta H. J. Finlay, 1926 accepted as Maoricrypta H. J. Finlay, 1926
Genus Zegalerus H. J. Finlay, 1926 accepted as Sigapatella R. P. Lesson, 1831
Family Crepidulidae J. Fleming, 1822 accepted as Calyptraeidae Lamarck, 1809
Superfamily Capuloidea J. Fleming, 1822 (218)
Superfamily Cassoidea accepted as Tonnoidea Suter, 1913 (1825)
Superfamily Cingulopsoidea Fretter & Patil, 1958 (193)
Superfamily Crepiduloidea J. Fleming, 1822 accepted as Calyptraeoidea Lamarck, 1809
Superfamily Cypraeoidea Rafinesque, 1815 (1 285)
Superfamily Eulimoidea R. A. Philippi, 1853 accepted as Vanikoroidea Gray, 1840
Superfamily Ficoidea Meek, 1864 (1840) (71)
Superfamily Heteropoda Lamarck, 1812 accepted as Pterotracheoidea Rafinesque, 1814
Superfamily Hipponicoidea Troschel, 1861 (99)
Superfamily Littorinoidea Children, 1834 (1 372)
Superfamily Naticoidea Guilding, 1834 (688)
Superfamily Pterotracheoidea Rafinesque, 1814 (63)
Superfamily Rissoacea accepted as Rissooidea Gray, 1847
Superfamily Rissoinoidea W. Stimpson, 1865 accepted as Rissooidea Gray, 1847
Superfamily Rissooidea Gray, 1847 (2 311)
Superfamily Stromboidea Rafinesque, 1815 (835)
Superfamily Tonnoidea Suter, 1913 (1825) (788)
Superfamily Truncatelloidea J. E. Gray, 1840 (6 902)
Superfamily Vanikoroidea Gray, 1840 (1 331)
Superfamily Velutinoidea Gray, 1840 (648)
Superfamily Vermetoidea Rafinesque, 1815 (172)
Superfamily Xenophoroidea Troschel, 1852 (1840) accepted as Stromboidea Rafinesque, 1815
Order Neogastropoda (23 716)
Order Stenoglossa accepted as Neogastropoda
Subclass Gastropoda incertae sedis (308)
Subclass Heterobranchia (39 156)
Subclass Neomphaliones accepted as Vetigastropoda
Subclass Neritimorpha (1 914)
Subclass Orthogastropoda represented as Gastropoda
Subclass Patellogastropoda (511)
Subclass Prosobranchia
Subclass Psilogastropoda represented as Gastropoda
Subclass Vetigastropoda (6 782)
Class Lamellibranchiata accepted as Bivalvia
Class Loricata accepted as Polyplacophora
Class Mollusca incertae sedis † (372)
Class Monoplacophora (229)
Class Pelecypoda accepted as Bivalvia
Class Polyplacophora (1 377)
Class Polyplaxiphora accepted as Polyplacophora
Class Rostroconchia † (64)
Class Scaphopoda (752)
Class Solenoconchia accepted as Scaphopoda
Class Solenogastres (313)
Subclass Chaetodermomorpha accepted as Caudofoveata