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Mollusca (133 046)
Subphylum Aculifera
Subphylum Conchifera
Subphylum Placophora accepted as Polyplacophora
Superclass Aplacophora
Class Amphineura accepted as Aculifera
Class Bivalvia (25 043)
Class Caudofoveata (143)
Class Cephalopoda (1 863)
Class Conchifera accepted as Bivalvia
Class Cricoconarida † (1)
Class Gastropoda (102 884)
Subclass Amphigastropoda † (414)
Subclass Angiogastropoda represented as Gastropoda
Subclass Apogastropoda
Subclass Caenogastropoda (53 764)
Subclass Gastropoda incertae sedis (309)
Infraclass Tretospira †
Superfamily Archinacelloidea Knight, 1952 † (51)
Superfamily Clisospiroidea S. A. Miller, 1889 † (17)
Superfamily Euomphaloidea C. A. White, 1877 † (77)
Superfamily Loxonematoidea Koken, 1889 † (31)
Family Loxonematidae Koken, 1889 † (17)
Genus Cheilotoma Koken, 1889 † accepted as Cheilotomona Strand, 1928 †
Genus Eligmoloxus Piette, 1885 †
Genus Holopella McCoy, 1851 † (2)
Genus Loxonema J. Phillips, 1841 † (8)
Subgenus Loxonema (Stylonema) Perner, 1907 † accepted as Stylonema Perner, 1907 †
Species Loxonema (Stylonema) potens Perner, 1907 † accepted as Stylonema potens Perner, 1907 †
Species Loxonema absoluta (Goldfuss, 1844) † accepted as Stylonema absoluta (Goldfuss, 1844) †
Species Loxonema antiqua (Münster, 1840) † accepted as Holopella antiqua (Münster, 1840) †
Species Loxonema arctecostata (Münster, 1841) † accepted as Zygopleura arctecostata (Münster, 1841) †
Species Loxonema arduum Kirchner, 1915 †
Species Loxonema attenuata (Stevens, 1858) † accepted as Zygopleura attenuata (Stevens, 1858) †
Species Loxonema attenuatum Lindström, 1884 †
Species Loxonema babbinboonensis Etheridge, 1907 †
Species Loxonema bella Walcott, 1884 † accepted as Bellazona bella (Walcott, 1884) †
Species Loxonema bellatulum J. Hall, 1861 † accepted as Elasmonema bellatulum (J. Hall, 1861) †
Species Loxonema brevis McCoy, 1844 †
Species Loxonema cancellata (J. De C. Sowerby, 1839) †
Species Loxonema carinatum Kirchner, 1915 †
Species Loxonema cerithiformis Meek & Worthen, 1861 †
Species Loxonema conica (J. De C. Sowerby, 1839) †
Species Loxonema crassum C. L. Webster, 1888 †
Species Loxonema difficile Sardeson, 1902 † accepted as Palaeozygopleura difficile (Sardeson, 1902) †
Species Loxonema elegans McCoy, 1851 †
Species Loxonema elegantissima Yoo, 1988 †
Species Loxonema fasciatum Lindström, 1884 †
Species Loxonema gigantea C. L. Webster, 1888 † accepted as Westerna gigantea (C. L. Webster, 1888) †
Species Loxonema girzenbergense Kirchner, 1915 † accepted as Soetenichia girzenbergense (Kirchner, 1915) †
Species Loxonema gregaria (J. De C. Sowerby, 1839) †
Species Loxonema hallii Whidborne, 1896 †
Species Loxonema haueri Laube, 1868 † accepted as Gusellella haueri (Laube, 1868) †
Species Loxonema hydraulica J. Hall & Whitfield, 1872 †
Species Loxonema impendens McCoy, 1844 †
Species Loxonema incurvelineatum Kirchner, 1915 †
Species Loxonema ingens Frech, 1894 † accepted as Nodoloxonema ingens (Frech, 1894) †
Species Loxonema inornata Meek & Worthen, 1861 †
Species Loxonema intumescens Lindström, 1884 †
Species Loxonema johannisboehmi E. Philippi, 1898 †
Species Loxonema kasanensis Netchaev, 1894 † accepted as Arribazona kasanensis (Netchaev, 1894) †
Species Loxonema lamellosa W. G. H. Maxwell, 1961 †
Species Loxonema magnificum Spitz, 1907 † accepted as Nodoloxonema magnificum (Spitz, 1907) †
Species Loxonema microphanula X.-D. Qiao, 1983 †
Species Loxonema multicostata Meek & Worthen, 1861 †
Species Loxonema naticoides Holzapfel, 1889 † accepted as Auriptygma naticoides (Holzapfel, 1889) †
Species Loxonema nitidula Meek & Worthen, 1861 †
Species Loxonema ornamentaria Netchaev, 1894 † accepted as Stephanozyga ornamentaria (Netchaev, 1894) †
Species Loxonema owenensis C. L. Webster, 1888 †
Species Loxonema paludinoides Kirchner, 1915 †
Species Loxonema parva Stauffer & Schroyer, 1920 † accepted as Anthracopupa parva (Stauffer & Schroyer, 1920) †
Species Loxonema paucicostatum Kirchner, 1915 †
Species Loxonema permiana Beede, 1907 † accepted as Streptacis permiana (Beede, 1907) †
Species Loxonema pexata J. Hall, 1861 †
Species Loxonema planoverticum Netchaev, 1894 † accepted as Palaeostylus planoverticum (Netchaev, 1894) †
Species Loxonema polygyra McCoy, 1844 †
Species Loxonema pulcherrima McCoy, 1844 †
Species Loxonema pygmaeum Holzapfel, 1889 † accepted as Auriptygma pygmaea (Holzapfel, 1889) †
Species Loxonema retrostriatum Kirchner, 1915 † accepted as Palaeozygopleura retrostriatum (Kirchner, 1915) †
Species Loxonema rugosa Meek & Worthen, 1861 †
Species Loxonema scitula Meek & Worthen, 1861 †
Species Loxonema semicostatum Meek, 1871 † accepted as Pseudozygopleura semicostatum (Meek, 1871) †
Species Loxonema sinuosa (J. de Sowerby, 1839) †
Species Loxonema spiraglobosum Kirchner, 1915 †
Species Loxonema strangulatum Lindström, 1884 †
Species Loxonema subelongata A. d'Orbigny, 1850 † accepted as Subulites subelongata (A. d'Orbigny, 1850) †
Species Loxonema subgracilis Netchaev, 1894 † accepted as Streptacis subgracilis (Netchaev, 1894) †
Species Loxonema subnuda Kittl, 1894 † accepted as Piazella subnuda (Kittl, 1894) †
Species Loxonema subobsoleta A. d'Orbigny, 1850 † accepted as Stylonema absoluta (Goldfuss, 1844) †
Species Loxonema sulcatula McCoy, 1844 †
Species Loxonema tenuis (Münster, 1841) †
Species Loxonema teres (Münster, 1842) †
Species Loxonema turrita McCoy, 1844 †
Genus Microptychis Longstaff, 1912 † (1)
Genus Nodoloxonema Blodgett, Fryda & Racheboeuf, 1999 † (3)
Genus Pleurotrochus Grabau, 1910 † accepted as Microdoma Meek & Worthen, 1866 †
Genus Stylonema Perner, 1907 † (3)
Family Loxonematoidea incertae sedis † (2)
Family Palaeozygopleuridae Horný, 1955 † (12)
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 (39 186)
Subclass Neomphaliones accepted as Vetigastropoda
Subclass Neritimorpha (1 914)
Subclass Orthogastropoda represented as Gastropoda
Subclass Patellogastropoda (514)
Subclass Prosobranchia
Subclass Psilogastropoda represented as Gastropoda
Subclass Vetigastropoda (6 783)
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 (1 381)
Class Polyplaxiphora accepted as Polyplacophora
Class Rostroconchia † (64)
Class Scaphopoda (753)
Class Solenoconchia accepted as Scaphopoda
Class Solenogastres (313)
Subclass Chaetodermomorpha accepted as Caudofoveata