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Mollusca (132 851)
Subphylum Aculifera
Subphylum Conchifera
Subphylum Placophora accepted as Polyplacophora
Superclass Aplacophora
Class Amphineura accepted as Aculifera
Class Bivalvia (25 013)
Class Caudofoveata (143)
Class Cephalopoda (1 834)
Class Conchifera accepted as Bivalvia
Class Cricoconarida † (1)
Class Gastropoda (102 753)
Subclass Amphigastropoda † (396)
Subclass Angiogastropoda represented as Gastropoda
Subclass Apogastropoda
Subclass Caenogastropoda (53 670)
Subclass Gastropoda incertae sedis (308)
Infraclass Tretospira †
Superfamily Archinacelloidea Knight, 1952 † (51)
Family Archaeopragidae Horný, 1963 † (1)
Family Archinacellidae Knight, 1952 † (45)
Genus Archinacella Ulrich & Scofield, 1897 † (37)
Species Archinacella alta Wahlman, 1992 †
Species Archinacella approximans Koken & Perner, 1925 †
Species Archinacella arca Wahlman, 1992 †
Species Archinacella canadensis (Whiteaves, 1884) † accepted as Guelphinacella canadense (Whiteaves, 1884) †
Species Archinacella capuloidea Perner, 1903 † accepted as Archinacellina modesta (Barrande, 1903) †
Species Archinacella cingulata Ulrich, 1897 †
Species Archinacella clochensis Foerste, 1914 †
Species Archinacella davisi Wahlman, 1992 †
Species Archinacella deformata (J. Hall, 1847) †
Species Archinacella deleta (Sardeson, 1892) †
Species Archinacella depressa Ulrich & Scofield, 1897 †
Species Archinacella elongata Cullison, 1944 † accepted as Proplina elongata (Cullison, 1944) †
Species Archinacella estella (Billings, 1865) †
Species Archinacella explanata (Sardeson, 1892) †
Species Archinacella indianensis (S. A. Miller, 1892) †
Species Archinacella instabilis (Billings, 1865) †
Species Archinacella kagawongensis Foerste, 1924 †
Species Archinacella laevis Foerste, 1924 †
Species Archinacella magna Flower, 1968 †
Species Archinacella melissa (Billings, 1865) †
Species Archinacella mitra Perner, 1903 † accepted as Archinacellina mitra (Perner, 1903) †
Species Archinacella modesta Barrande, 1903 † accepted as Archinacellina modesta (Barrande, 1903) †
Species Archinacella norwegica (Koken, 1925) †
Species Archinacella ovata Barrande, 1903 † accepted as Barrandicella ovata (Barrande, 1903) †
Species Archinacella parva Flower, 1968 †
Species Archinacella perovalis (Whitfield, 1878) †
Species Archinacella pileolum (Whitfield, 1889) †
Species Archinacella powersi Ulrich & Scofield, 1897 †
Species Archinacella prendergasti Reed, 1906 †
Species Archinacella proprius Raymond, 1906 †
Species Archinacella proxima Barrande, 1903 † accepted as Archinacellina modesta (Barrande, 1903) †
Species Archinacella pulaskiensis Foerste, 1914 †
Species Archinacella richmondensis Ulrich, 1897 † accepted as Archinacella indianensis (S. A. Miller, 1892) †
Species Archinacella rostrata Perner, 1903 †
Species Archinacella rotunda Ulrich & Scofield, 1897 †
Species Archinacella rugatina Ulrich, 1897 †
Species Archinacella semicarinata Ulrich & Scofield, 1897 †
Species Archinacella similis (Whitfield, 1878) †
Species Archinacella simmonsi Hussey, 1926 † accepted as Archinacella kagawongensis Foerste, 1924 †
Species Archinacella simplex (Billings, 1865) †
Species Archinacella simulatrix Ulrich & Scofield, 1897 †
Species Archinacella stoermeri Yochelson, 1963 †
Species Archinacella subglobosa Perner, 1903 †
Species Archinacella sublaevis Perner, 1903 † accepted as Archinacellina modesta (Barrande, 1903) †
Species Archinacella subrotunda Ulrich & Scofield, 1897 †
Species Archinacella trentonensis (Billings, 1865) †
Species Archinacella valida (Sardeson, 1892) †
Species Archinacella wanwanensis Kobayashi, 1933 †
Genus Archinacellopsis Horný, 1995 † (1)
Genus Barrandicella Peel & Horný, 1999 † (3)
Genus Barrandicellopsis Horný, 2000 † (2)
Genus Guelphinacella Peel, 1990 † (1)
Genus Marekicella Horný, 1997 † (1)
Family Archinacelloidea incertae sedis † (1)
Family Pollicinidae Perner, 1925 † (4)
Superfamily Clisospiroidea S. A. Miller, 1889 † (17)
Superfamily Euomphaloidea C. A. White, 1877 † (77)
Superfamily Loxonematoidea Koken, 1889 † (30)
Superfamily Ophiletoidea Koken, 1907 † (9)
Superfamily Oriostomatoidea Koken, 1896 † (6)
Superfamily Palaeotrochoidea Knight, 1956 † (2)
Superfamily Straparollinoidea P. J. Wagner, 2002 † accepted as Euomphaloidea C. A. White, 1877 †
Superfamily Trochonematoidea Zittel, 1895 † (26)
Family Ceratopeidae Yochelson & Bridge, 1957 † accepted as Raphistomatidae Koken, 1896 †
Family Codonocheilidae S. A. Miller, 1889 †
Family Craspedostomatidae Wenz, 1938 †
Family Crassimarginatidae Frýda, Blodgett & Lenz, 2002 †
Family Discohelicidae M. Schröder, 1995 † (41)
Family Isospiridae Wangberg-Eriksson, 1964 †
Family Opisthonematidae Yu, 1976 † accepted as Yuopisthonematidae Nützel, 2017 †
Family Paraturbinidae Cossmann, 1916 † (7)
Family Pragoserpulinidae Frýda, 1998 † (1)
Family Raphistomatidae Koken, 1896 † (25)
Family Rhytidopilidae Starobogatov, 1976 †
Family Scoliostomatidae Frýda, Blodgett & Lenz, 2002 †
Family Sinuopeidae Wenz, 1938 † (8)
Family Yuopisthonematidae Nützel, 2017 † (1)
Genus Alciope A. Adams, 1861
Genus Buccinites Gesner, 1758
Genus Eesticonus Peel, 2024 † (1)
Genus Eiserhardtia Frýda, 2000 † (1)
Genus Eocryphispira X.-H. Yu, 1987 † (1)
Genus Peverilia Arkell, 1941 † (1)
Genus Phanerotinus Sowerby, 1844 † (1)
Genus Rhenomphalus Bandel & Frýda, 1998 † (1)
Genus Solandangella Horný, 1995 † (1)
Genus Toxonema J. Böhm, 1895 † accepted as Undularia Koken, 1892 †
Genus Undularia Koken, 1892 †
Genus Vayssieria Fenaux, 1942
Subclass Heterobranchia (39 172)
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