After Jeffery, 2001-2003 [“The GastroClass”]

Class GASTROPODA Cuvier, 1797

?Archinacelloidea Knight, 1952 {placement fide Peel & Horný, 1999; Lower Palaeozoic}
Archaeopragidae Horný, 1963
Archinacellidae Knight, 1952 {all originally in Class MONOPLACOPHORA [TERGOMYA].}

Superfamily uncertain
?Pragoscutulidae Frýda, 1998b {Devonian}
?Pragoserpulinidae Frýda, 1998a{Devonian}

Superfamily uncertain
?Gordenellidae Gruendel, 2000{Jurassic}

[MIMOSPIRINA to VETIGASTROPODA ±= ARCHAEOGASTROPODA Thiele, 1925 & DIOTOCARDIA Mörch, 1865; also (exc. Docoglossa) ±= ASPIDOBRANCHIA Schweigger, 1820, RHIPIDOGLOSSA Mörch, 1865 & SCUTIBRANCHIA Cuvier, 1817]

{Class or Subclass PARAGASTROPODA ±= MIMOSPIRINA, EUOMPHALINA + minor groups}

Order MIMOSPIRINA Dzik, 1983 [= HYPERSTROPHINA Linsley & Kier, 1984 p.p.]
Onychochiloidea Koken, 1925 [= Cliospiroidea Miller, 1887 (?1889) fide Golikov & Starobogatov, 1975]
Cliospiridae Miller, 1887{?1889}
Omphalocirridae Linsley, 1973 {HYPERSTROPHINA fide Linsley & Kier, 1984, ex Euomphaloidea}
Onychochilidae Koken, 1925
Yangtzespiriidae Yu, 1984{Yu, 1987, from Yangtzespirinae}

Subclass ORTHOGASTROPODA Ponder & Lindberg, 1996 [= PROSOBRANCHIA Milne Edwards, 1848 p.p. + OPISTHOBRANCHIA; = AZYGOBRANCHIA Spengel, 1881 p.p.]
Superorder UNCERTAIN
Order MURCHISONIINA Cox & Knight, 1960 {arr. fide Wagner, 2002} [includes Stylogastropoda Frýda & Bandel, 1997.]
Murchisonioidea Koken, 1896
?Acanthonematidae Wenz, 1938 {turritellids fide Ponder & Warén, 1988}
Crossostomatidae Cox, 1960
?Goniasmidae Nützel & Bandel, 2000 {originally in Cerithiimorpha}
Murchisoniidae Koken, 1896
?Orthonemidae Nützel & Bandel, 2000 {Palaeozoic; originally in Cerithiimorpha}
Hormotomidae Wenz, 1938 [=Plethospiridae Wenz, 1938 p.p., fide Wagner, 2002]
Loxonematoidea Koken, 1889 [= Zygopleuroidea Wenz, 1938]
Abyssochrysidae Tomlin, 1927
Coelostylinidae Cossmann, 1909
Loxonematidae Koken, 1889 [= Holopellidae Koken, 1897; &=Palaeozygopleuridae Horný, 1955 & Pseudozygopleuridae Knight, 1930 fide Frýda, 1993]
Polygyrinidae Bandel, 1993 {not in Zoo. Rec. for that year}
Pommerozygiidae Grundel, 1999 {Jurassic}
Protorculidae Bandel, 1991
Provannidae Warén & Ponder, 1991
Spirostylinidae Cossmann, 1909
Zygopleuridae Wenz, 1938 [?= Goniospiridae Golikov & Starobogatov, 1987]
Lophospiroidea Wenz, 1938 [= Trochonematacea Zittel, 1895]
?Clypidinidae Golikov & Starobogatov, 1988
Lophospiridae Wenz, 1938
Trochonematidae Zittel, 1895 {Ulrich & Scofield, 1897}
Eotomarioidea Wenz, 1938 {rank & const. fide Wagner, 2002}
Eotomariidae Wenz, 1938
Gosseletinidae Wenz, 1938
Luciellidae Knight, 1956
Phanerotrematidae Knight, 1956
Straparollinoidea Wagner, 2002
Straparollinidae Wagner, 2002
Grade* Subulitoidea Lindström, 1884 {* fide Nützel, Erwin & Mapes, 2000}
?Imoglobidae Nützel, Erwin & Mapes, 2000
Ischnoptygmidae Erwin, 1988
?Meekospiridae Knight, 1956
Subulitidae Lindström, 1884 [= Bullimorphidae Miller, 1889, Fusispiridae Miller, 1889 & Soleniscidae Wenz 1938]

Superorder COCCULINIFORMIA Hazsprunar, 1987 {may not be monophyletic fide Ponder & Lindberg, 1996; Haszprunar in Beesley, Ross & Wells, 1998}
Cocculinoidea Dall, 1882 [= Bathypeltoidea Moskalev, 1971; Bathysciadioidea Dautzenberg & Fischer, 1900]
Bathysciadiidae Dautzenberg & Fischer, 1900
Cocculinidae Dall, 1882
Lepetelloidea Dall, 1882 [= Addisonioidea Dall, 1882; Addissonioidea (sic), auctt.; & LEPETELLIDA Moskalev, 1971]
Addisoniidae Dall, 1882 [= Addissoniidae (sic)]
Bathypeltidae Moskalev, 1971
Bathyphytophilidae Moskalev, 1978
Choristellidae Verrill, 1882 {?Bouchet & Warén, 1979} [= Choristidae auctt.]
Cocculinellidae Moskalev, 1971
Lepetellidae Dall, 1882 {?1881}
Osteopeltidae Marshall, 1987
Pseudococculinidae Hickman, 1983
Pyropeltidae McLean & Haszprunar, 1987

Superorder NERITOPSINA Cox & Knight, 1960 [= NERITIMORPHA; NERITOPSIFORMES]

?Palaeotrochoidea Knight, 1956 [= Paraturbinoidea Cossmann, 1916 (Golikov & Starobogatov, 1975)] {new arrangement herein, ?polyphyletic}
Ataphridae Cossmann, 1918
Palaeotrochidae Knight, 1956
Paraturbinidae Cossmann, 1916

Order CYRTONERITIMORPHA Bandel & Frýda, 1999
Orthonychiidae Bandel & Frýda, 1999 {Palaeozoic}
Vltaviellidae Bandel & Frýda, 1999 {Devonian}

Order NERITOIDA [= CYCLONERITIMORPHA Bandel & Frýda, 1999]
Neritoidea Rafinesque, 1815 [= Helicinoidea Latreille, 1825, Hydrocenoidea Troschel, 1856 Neritopsioidea Gray, 1847 & Titiscanioidea Bergh, 1890 (Golikov & Starobogatov, 1975)]
Ceresidae Thompson, 1980
Chilodontidae Wenz, 1938 [non Pisces: Characiformes] {placement fide Golikov & Starobogatov, 1988 ex Trochoidea}
Cortinellidae Bandel, 2000 {Triassic}
Dawsonellidae Wenz, 1938
Deianiridae Wenz, 1938 [= Dejaniridae Wenz, 1938]
Helicinidae Latreille, 1825 [= Despoenidae Newton, 1891; Oligogyradae Gray, 1847 & Stoastomidae Adams, 1849]
Hydrocenidae Troschel, 1856
Neritidae Rafinesque, 1815 [= Protoneritidae Kittl, 1899, & = Septariidae Golikov & Starobogatov, 1975]
Neritopsidae Gray, 1847 [= Hologyridae Kittl, 1899]
Payettiidae Dall, 1924
Phenacolepadidae Pilsbry, 1895 {& Thiele, 1929} [= Scutellinidae Dall, 1889]
Plagiothyridae Knight, 1956
Proserpinidae Gray, 1847
Pseudorthonychiidae Bandel & Frýda, 1999 {of Neritopsioidea. Triassic}
Shinkailepadidae Okutani, Saito & Hashimoto, 1989
Titiscaniidae Bergh, 1890
Symmetrocapuloidea Wenz, 1938
Symmetrocapulidae Wenz, 1938 {Cocculinoidea in Golikov & Starobogatov, 1975}

Superorder VETIGASTROPODA Salvini-Pläwen, 1980 [= TURBINIMORPHA Golikov & Starobogatov, 1975; ZEUGOBRANCHIA Von Ihering, 1876 & ZYGOBRANCHIA Spengel, 1881, all p.p.]

?Tychobraheidae Horný, 1990

Order UNCERTAIN [= Trochina Cox & Knight, 1960 + Pleurotomariina C & K, 1960; &±= Ligobranchia]
Pleurotomarioidea Swainson, 1840
Catantostomatidae Wenz, 1938
Euomphalopteridae Koken, 1896
Kittlidiscidae Cox, 1960
Laubellidae Cox, 1960
Omospiridae Wenz, 1938 {?Fissurelloidea}
Phymatopleuridae Batten, 1956
Pleurotomariidae Swainson, 1840
Polytremariidae Wenz, 1938
Portlockiellidae Batten, 1956
Rhaphischismatidae Knight, 1956
Scissurelidae Gray, 1847
Trochotomidae Cox, 1960
Zygitidae Cox, 1960
Haliotoidea Rafinesque, 1815 {fide Yoon & Kim, 2000}
Haliotidae Rafinesque, 1815
Raphischiamatidae Knight, 1938
Temnotropidae Cox, 1960
Fissurelloidea Fleming, 1822
Clypeosectidae McLean, 1989 [= Cypeosectidae Tracey, Todd & Erwin, sic]
Fissurellidae Fleming, 1822 [= Emarginulidae Gray, 1834]
Hemitomidae Golikov & Starobogatov, 1975
Seguenzioidea Verril, 1884
Schizogoniidae Cox, 1960
Seguenziidae Verril, 1884
Trochoidea Rafinesque, 1815 {fide Hickman & McLean, 1990} [= MONOTICARDIA auctt., PECTINIBRANCHIA auctt., Amberleyoidea Wenz, 1938, Calliostomatoidea Thiele, 1924, Cirroidea Cossmann, 1916, Trachysmatacea Thiele, 1910/1925 & Trochaclidacea Thiele, 1928; + Eucycloidea Koken, 1896/7 & Turbinoidea Rafinesque, 1815 (Golikov & Starobogatov, 1975)]
Davisianidae Egorova, 1972 {an Architectoniciforme fide Golikov & Starobogatov, 1988}
Discohelicidae Schroder, 1995 {Discohelix placed in Euomphalidae by Cox et al, 1960}
Larocheidae Finlay, 1927
Pendromidae Warén, 1991 [= Trachysmatidae Thiele, 1910/1925 (fide Warén, 1991) & Trachysmidae Wenz, 1939 nom. subst. pro. Trachysmatidae]
Skeneidae Clark, 1851 [= Cyclostrematidae P. Fischer, 1885 + Crosseolidae, Brookulidae & Callomphalidae all Iredale & McMichael, 1962]
Trochidae Rafinesque, 1815 [= Amberleyidae Wenz, 1938, Calliostomatidae Thiele, 1924, Calliostomidae Finlay, 1928 sic, Cirridae Cossmann, 1916, Eucyclidae Koken, 1896/7, Pavlodiscidae Frýda, 1998, Porcelliidae Broili, 1924, Stomatellidae Gray, 1840, Stomatiidae Stoliczka, 1868, Talopiidae Finlay, 1928, Trochaclididae Thiele, 1928 Umboniidae Adams & Adams, 1854 & ?Platyacridae Wenz, 1938]
Turbinidae Rafinesque, 1815 [= Angariidae Wenz, 1938, Bolmidae Delpey, 1942, Colloniidae Cossmann, 1916, Cyclostrematidae auctt. non Fischer, 1885, Delphinulidae P. Fischer, 1885, Eutropiidae Finlay, 1926, Nododelphinulidae Cox, 1960 & "Notodelphinulidae Cox, 1960" (sic) of Golikov & Starobogatov, 1975; Phasianellidae Swainson, 1840 & Tricoliidae Woodring, 1928]
Lepetodriloidea McLean, 1988
Gorgoleptidae McLean, 1988
Lepetodrilidae McLean, 1988
Sutilizonidae McLean, 1989
Superfamily uncertain {? aff. Trochoidea}
Velainellidae Vasseur, 1880 [= Velainiellidae P. Fischer, 1885]

?Microdomatoidea Wenz, 1938
?Elasmonematidae Knight, 1956
Microdomatidae Wenz, 1938

?Oriostomatoidea Wenz, 1938
Oriostomatidae Wenz, 1938 [= Horiostomidae Koken, 1897]
Tubinidae Knight, 1956

Infraclass APOGASTROPODA Salvini-Pläwen & Haszprunar, 1987 {CAENOGASTROPODA to HETEROBRANCHIA fide Harasewych & al 1997}

Superorder CAENOGASTROPODA Cox, 1959 [= MONOTOCARDIA Mörch, 1865; STREPTONEURA Spengel, 1881 p.p.) & CTENOBRANCHIATA Schweigger, 1820]

?Prisciophoridae Bandel, 2000 {Jurassic}

?Ladinulidae Bandel, 1992 {Triassic}
?Lanascalidae Bandel, 1992 {Triassic}
?Popenellidae Bandel, 1992 {Triassic}
?Prostyliferidae Bandel, 1992 {Triassic}
?Settsassiidae Bandel, 1992 {Triassic}

?Order PERUNELOMORPHA Frýda & Bandel, 1997
Peruneloidea Frýda & Bandel, 1997   {Early Ordovician - Carboniferous}
Chuchlinidae Frýda & Bandel, 1997
Perunelidae Frýda & Bandel, 1997

?Order UNCERTAIN
?Pseudomelanioidea P. Fischer, 1885
Pseudomelaniidae P. Fischer, 1885 [= Trajanellidae Pchelintsev, 1953]

Order ARCHITAENIOGLOSSA Haller, 1890 [= PALUDINIMORPHA Golikov & Starobogatov, 1975, VIVIPARIFORMES & VIVIPARIFORMII]
Cyclophoroidea Gray, 1847 [= Neocyclotoidea Kobelt & Moellendorf, 1897]
Craspedopomatidae Kobelt & Moellendorf, 1897 {& Kobelt, 1902} [= Maizaniidae Tielecke, 1940]
Cyclophoridae Gray, 1847 [= Ferussinidae (Wenz, 1938); Hainesiidae (Thiele, 1929) & Spirostomatidae (Tielecke, 1940) subfams. elev. fide Golikov & Starobogatov, 1975]
Diplommatinidae Pfeiffer, 1856 [= Cochlostomatidae Kobelt, 1902]
Neocyclotidae Kobelt & Moellendorf, 1897 [= Amphicyclotidae Kobelt & Moellendorf, 1897, Crocidopomidae Thompson, 1967, Dicristidae Golikov & Starobogatov, 1975 & Poteriidae Thiele, 1929]
Neopupinidae Kobelt, 1902 [= Neopupidae auctt. sic, Megalomastomidae Kobelt, 1902 & Megalomastomatidae err. pro Golikov & Starobogatov, 1975]
Pupinidae H & A Adams, 1855 [= Pupinellidae (Kobelt, 1902) Golikov & Starobogatov, 1975]
Strophostomatidae Wenz, 1916
Ampullarioidea Gray, 1824 [= Paludinoidea Fitzinger, 1833 & Viviparoidea Gray, 1847]
Ampulariidae Gray, 1824 [= Pilidae Preston, 1915]
Bellamyidae Rourbach, 1937
?Pliopholygidae Golikov & Starobogatov, 1975 non Taylor, 1966 nomen nudum et vanum
Viviparidae Gray, 1847 [= Paludinidae Fitzinger, 1833, & Gray, 1840]

?Craspedostomatoidea Wenz, 1938 [= Codonocheiloidea Miller, 1889 (Golikov & Starobogatov, 1975)]
Codonocheilidae Miller, 1889
Craspedostomatidae Wenz, 1938 [= Brochidiidae Yochelesen, 1956]

Order SORBEOCONCHA {Cerithioidea to Buccinoidea; Paraphyletic} [= DISCOPODA P. Fischer, 1884; &±= Neotaenioglossa: Cerithioidea to Carinarioidea; = Calyptraformii]
Suborder CERITHIIMORPHA Golikov & Starobogatov, 1975 [= CERITHIIFORMES]
?Spanionematoidea Golikov & Starobogatov, 1987
Spanionematidae Golikov & Starobogatov, 1987
Stephanozygidae Golikov & Starobogatov, 1987
Cerithioidea (Férussac, 1819 ) Fleming, 1822 [= ENTOMOSTOMA Blainville, 1824; Archimedielloidea Starobogatov, 1982; Melanacea Lamarck, 1812; Melanatrioidea Thiele, 1929; Melanopsoidea Adams & Adams, 1854; Planaxoidea Gray, 1850; Procerithiacea Cossmann, 1905; Siliquariacea Anton, 1838; Syrnolopsoidea Bourguignat, 1890 & Turritellacea Lovén, 1847]
Batillariidae Thiele, 1929
Brachytremidae Cossmann, 1906 {& Wenz, 1940}
Canterburyellidae Bandel, 2000 {Jurassic}
Cassiopidae Kollman, 1979
Cerithiidae (Férussac, 1819 ) Fleming, 1822 [= Bittiidae Cossmann, 1906 & Alabinidae Dall, 1928]
Dialidae Ludbrook, 1941
Diastomidae Crosse & Fischer, 1893 {& Cossmann, 1894} [= Diastomatidae Ludbrook, 1971 & Ewekoroidae Adegoke, 1977]
Eoptychiidae Golikov & Starobogatov, 1987 [?= Melanopsidae]
Eustomidae Cossmann, 1906
Faxiidae Ravn, 1933
Lavigeriidae Thiele, 1925 [?= Nassopsidae Kesteven, 1902]
Litiopidae Gray, 1847
Maoraxidae Bandel, 2000 {Jurassic}
Melanopsidae Adams & Adams, 1854 [= Melanopidae Gill, 1863]
Modulidae P. Fischer, 1884 {not 1885} [= Aplodonidae Anon., 1933]
Pachychilidae Troschel, 1857 [= Anaplocamidae Dall, 1921; Cleopatridae Germain, 1934; Giraudiidae Bourguignat, 1885; Gymnocerithiidae Golikov & Starobogatov, 1987; Hauttecoeuridae Bourguignat, 1885; Melanatriidae Thiele, 1929; Paludomidae Gill, 1871; Pleuroceridae P. Fischer, 1885; Pleuroceratidae Pchelintsev, & Korobkov, 1960; Strepomatidae Haldeman, 1863 & Typhobiidae Moore, 1898]
Pachymelaniidae Bandel & Kowalke, 1999
Pareoridae Finlay & Marwick, 1937
?Pianaridae Pchelintsev, 1968
Planaxidae Gray, 1850 [= Fossaridae Troschel, 1861 & Planacidae MacDonald, 1860]
Potamididae Adams & Adams, 1854 [= Cerithideidae Houbrick, 1988 & Telescopiidae Allan, 1950]
Procerithiidae Cossmann, 1905 {as Procerithidae}
Pseudamaurinidae Kowalke & Bandel, 1996
Scaliolidae Jousseaume,1912 [= Obtortionidae Thiele, 1925 & Finellidae Thiele, 1929 (=Fenellidae Ponder & Warén, 1988 sic)]
Syrnolopsidae Bourguignat, 1890
Tenagodidae Gill, 1871 [= Siliquariidae Anton, 1838 fide Bieler, 1992a]
Terebrellidae Delpey, 1941
Thiaridae Troschel, 1857 {& Preston, 1915} [= Melaniidae Lamarck, 1812 & Melanoididae Starobogatov & Izzatullaev, 1980]
Turritellidae Lovén, 1847 [= Archimediellidae Starobogatov, 1982; Vermiculariidae Faustino, 1928 & PROTOPODA P. Fischer, 1884 p.p.]
?Turritellopsidae Starobogatov, 1983 {of Turritellopsoidea, nom nud.}
Campaniloidea Douvillé, 1904 [= suborder CAMPANILIMORPHA]
Campanilidae Douvillé, 1904 [= Diozoptyxisidae Pchelintsev & Korobkov, 1960; &=Dioptyxisidae & Dizoptyxisidae Kollman & Peza, 1996 (sic), formerly Nerineoidea]
Plesiotrochidae Houbrick 1990

Suborder HYPSOGASTROPODA {Calyptraeoidea to Buccinoidea} [= LATROGASTROPODA Riedel, 2000]

?Superfamily Uncertain
?Weeksiidae Sohl, 1960

infraorder LITTORINIMORPHA [= NEOMESOGASTROPODA; TAENIOGLOSSA Troschel, 1848 p.p. &= MESOGASTROPODA Thiele, 1925 p.p.]
Calyptraeoidea Lamarck, 1809 [= CALYPTRAEIFORMES auctt., Crepiduloidea Fleming, 1822 & ECHINOSPIRIDA / Echinospiracea Fretter & Graham, 1962 all p.p.]
Calyptraeidae Lamarck, 1809 [= Crepiduladae Fleming, 1822]
?Isospiridae Wängberg-Eriksson, 1964
Capuloidea Fleming, 1822 [= Crepiduloidea p.p.]
Capulidae Fleming, 1822 [= Lippistidae Iredale, 1924, Siriidae Iredale, 1931 & Verenadae Gray, 1857]
Trichotropidae Adams & Adams, 1854 [= Cerithiodermidae Akopyan, 1973 & Trichotropididae P. Fischer, 1885]
Carinarioidea Blainville, 1818 [= Atlantacea Rang, 1829, CARYCHOBRANCHIA, GASTEROPTEROPHORA, HETEROPODA Lamarck, 1812, NATANTIA, NECTOPODA Blainville, ?1824 p.p., NUCLEOBRANCHIATA, Pterotrachacea Oken, 1815 (& Férussac, 1819)]   {Planktonic}
Atlantidae Rang, 1829 {& Deshayes, 1830} [= Bellerophonidae Destombes, 1983]
Carinariidae Blainville, 1818 {& Reeve, 1841}
Pterosomatidae Rang, 1829
Pterotracheidae Oken, 1815 [= Firolidae Rang, 1829] {& Férussac, 1819, Gray, 1843; shell-less post-larvally}
Cypraeoidea Rafinesque, 1815 {& Velutinoidea: synonymy fide Schilder & Schilder, 1971 & Ponder & Warén, 1988} [= INVOLUTA P. Fischer, 1884, Ovuloidea Fleming, 1822, Dactyloglossa & Digitiglossa]
Cypraeidae Rafinesque, 1815 [= Cypraeideae Gray, 1824, Cypraeovulidae Schilder, 1927 & Porcellanidae Roberts, 1870 non Gray, 1853]
?Inviidae ?author
Ovulidae Fleming, 1822 [= Amphiperasidae Adams & Adams, 1854, Amphiperatidae Gray, 1853 (&?Winckworth, 1929) & Ovuladae, Fleming, 1828]
Velutinoidea Gray, 1840 [= Lamellarioidea d'Orbigny, 1841, Pedicularioidea Gray, 1853 (& Adams & Adams, 1854) & Trivioidea Troschel, 1863]
Pediculariidae Gray, 1853 {& Adams & Adams, 1854}
Pseudosacculidae Hirase, 1928 {& Wenz, 1940} [= Sacculidae Thiele, 1929]
Triviidae Troschel, 1863 [= Eratoidae Gill, 1871]
Velutinidae Gray, 1840 [= Cryptostomidae de Kay, 1843, Lamellaridae/Lamellariidae d'Orbigny, 1841 & Marseniadae/Marseniidae Troschel, 1847]
Littorinoidea Gray, 1840 [= LITTORINIFORMES auctt., LITTORINATA Pchelintsev, 1963 & LITTORININA Golikov & Starobogatov, 1975 all p.p.; + Aciculoidea Gray, 1850, Pomatiasoidea Gray, 1852, Purpurinoidea Zittel, 1895 & Skeneopsoidea Iredale, 1915]
Aciculidae Gray, 1850 {? 1842, & Woodward, 1854} [= Acmeidae Pollonera, 1905 Acmidae Kobelt, 1894 & Egeidae MacDonald, 1860]
Littorinidae Gray, 1840 [= Bembiciidae Finlay, 1928 & Lacunidae Gray, 1857 (& Gill, 1871) ]
?Pickworthiidae Iredale, 1917 [= Reynellonidae Iredale, 1917 & ?= Pelycidiidae Ponder & Hall, 1983]
Pomatiasidae Gray, 1852 [= Annulariidae Henderson & Bartsch, 1920, Chondropomatidae Henderson & Bartsch, 1920, Cyclostomatidae Férussac, 1821, Ericiidae Bartsch, 1946 & Licinidae Gray, 1857]
?Purpurinidae Zittel, 1895
?Skeneopsidae Iredale, 1915
Zerotulidae Warén & Hain, 1996
Cingulopsoidea Fretter & Patil, 1958 [= Rastodentoidea Ponder, 1966]
Cingulopsidae Fretter & Patil, 1958 [= Coriandriidae Nordsieck, 1972 & Eatoninidae Golikov & Starobogatov, 1975]
Eatoniellidae Ponder, 1968
Rastodentidae Ponder, 1966 [= Rastodenidae pre emend.]
Naticoidea Forbes, 1838 [= NATICIFORMES auctt., ASPIDOPHORA P. Fischer, 1884 & Choristiacea Verrill, 1882]
Ampullinidae Cossmann, 1918 [= Ampullospiridae Cox, 1930 & Euspiridae Cossmann, 1907; Globulariidae Wenz, 1941; Gyrodidae Wenz, 1941 & Gyrodeidae (sic) Golikov & Starobogatov, 1975 non Wenz]
Naticidae Forbes, 1838 [= Choristidae Verrill, 1882, Cryptosomidae Gray, 1827, Polinicidae Gray, 1847; Polynicidae (sic), auctt. & Sinidae Wenz, 1941]
Rissooidea Gray, 1847 {& Adams & Adams, 1854} [= RISSOIFORMES auctt. p.p.; Alvanioidea Golikov & Starobogatov, 1975; Assimineoidea Adams & Adams, 1856; Barleeioidea Gray, 1857; Bithynioidea Gray, 1857; Caecoidea Gray, 1850; Hydrobioidea Troschel, 1857; Littoridinoidea Gray, 1857; Microrissoidea Nordsieck, 1972 p.p.; Moitesierioidea Bourguignat, 1863; Pyrguloidea Brusina, 1881; Rissoinoidea Stimpson, 1865; Semisalsoidea Slavoshevskaya, 1980; Tateoidea Thiele, 1925; Tornoidea Sacco, 1896 & Truncatelloidea Gray, 1840]
Adeorbidae Monterosato, 1884 [= Circulidae Fretter & Graham, 1962]
Anabathridae (Coan, 1964) Keen, 1971 [= Anabathronidae Coan, 1964 & Amphithalamidae Voorwinde, 1966]
Assimineidae Adams & Adams, 1856 [= Realiidae Gray, 1852 (& ?Pfeiffer, 1853 & 1858), Paludinellidae Habe, 1976, Synceratidae Bartsch, 1920 & Tutuilanidae Hubendick, 1952]
Barleeidae Gray, 1857 [= Ansolidae Slavoshevskaya, 1975 & Heterophrosynidae Clark, 1855 {also synonymised with Rissoellidae P&W, 1988}]
Bithyniidae Gray, 1857 [= Bulimidae Guilding, 1828 non Müller, 1871]
Caecidae Gray, 1850 [= Ctiloceratidae Iredale & Laseron, 1957]
Calopiidae Ponder, 1999
Elachisinidae Ponder, 1985
Emblandidae Ponder, 1985
Epigridae Ponder, 1985
Falsicingulidae Slavoshevskaya, 1975/6?
Hydrobiidae Troschel, 1857 [= Baicaliidae P. Fischer, 1885; Benedictiidae Clessin, 1878 (& ?1880; as subfam.); ?Bohaispiridae Youluo, 1978; Bythinellidae Germain, 1931; Dabrianidae Starobogatov, 1983; Emmericiidae Brusina, 1870; Fluminicolidae Clessin, 1880; Kolhymanicolidae, Starobogatov, 1983; Lanzaiidae, Starobogatov, 1983; Lepyriidae Pilsbry & Olsson, 1951; Lithoglyphidae Troschel, 1857; Lithoglyphulidae Radoman, 1973; Littoridinidae Gray, 1857; Mexithaumidae Golikov & Starobogatov, 1975 (sic) non Taylor 1966; Micromelaniidae Thiele, 1925; Micropyrgulidae Radoman, 1973; Moitessieriidae Bourguignat, 1863; Orientaliidae Radoman, 1972/3; Orientalinidae Radoman, 1978; Orygoceratidae Taylor, 1966; Paludestrinidae Newton, 1891; Parabythinellidae Radoman, 1976; Potamopyrgidae Baker, 1928; Pseudocaspiidae Sitnikova & Starobogatov, 1983; Pyrgulidae E. von Martens, 1858 (& Brusina, 1881); Semisalsidae Slavoshevskaya, 1980; Tanousiidae Starobogatov, 1983; Tateidae Thiele, 1925; Terrestribythinellidae Sitnikova, Starobogatov & Astratenko, 1992 & Turricaspiidae Dybowski & Grochmalicki, 1915; most fide Kabat & Hershler, 1993]
Hydrococcidae Thiele, 1928
Iravadiidae Thiele, 1928 [= Fairbankiidae Thiele, 1928 & Hyalidae Golikov & Starobogatov, 1975 (& Starobogatov, Sitnikova & Zatravkin, 1989) non Bulycheva 1957 (Crustacea)]
Istrianidae Starobogatov, 1983
Pomatiopsidae Stimpson, 1865 [= Coxiellidae Iredale, 1943, Delvayidae Annandale, 1924, Oncomelaniidae Salisbury & Edwards, 1961, & Tomichiidae Wenz, 1939]
Rissoidae Gray, 1847 [= Alvaniidae Golikov & Starobogatov, 1975, Haurakiidae Slavoshevskaya, 1975, Lironobidae Ponder, 1967, Merelinidae Golikov & Starobogatov, 1975, Onobidae Golikov & Scarlato, 1967, Rissoinidae Stimpson, 1865 & Turbonidae Leach in Gray, 1847]
Sadlerianidae ?author
Stenothyridae P. Fischer, 1885 [= Sinothyridae sic]
Tornidae Sacco, 1896
Truncatellidae Gray, 1840 [= Acmeidae auctt. non Pollonera, 1905 & Geomelaniidae Kobelt & Möllendorf, 1897]
Vitrinellidae Bush, 1897
Stromboidea Rafinesque, 1815 [= STROMBIFORMES auctt., Rostellariacea Delpey, 1941]
Aporrhaidae Gray, 1850 [= Chenopodidae Deshayes, 1866, Chenopidae Koken, 1896, Dicrolomidae Korotkov, 1992*, Harpagodidae Pchelintsev, 1963*, Harpagodesidae Pchelintsev, 1963, Perissopteridae Korotkov, 1992* & Spinigeridae Korotkov, 1992* (* synonymised herein)]
Colombellinidae P. Fischer, 1884 [as Columbellinidae; = Columbellariidae Pchelintsev & Korobkov, 1960]
Pugnellidae Kiel & Bandel, 1999
Strombidae Rafinesque, 1815 [= Strombusidae Fleming, 1822 & Rostellariidae Delpey, 1941 & Tibiidae Golikov & Starobogatov, 1975]
Struthiolariidae Gabb, 1868 (P. Fischer, 1884)
Seraphidae Gray, 1853 [= Seraphsidae Jung, 1974 & Terebellidae Korobkov, 1955]
Thersiteidae Savorin, 1914
Zitteliidae Schilder, 1936 {supposedly ancestral to cypraeoids and velutinoids fide Wenz, 1940, & Schilder & Schilder, 1971} [?= Colombellinidae]
Ficoidea Meek, 1864
Ficidae Meek, 1864 {& Conrad, 1867} [= Ficulidae Carpenter, 1857, Pyrulidae Swainson, 1840 & Sycotypidae Gray, 1850]
Thalassocyonidae Riedel, 1994
Tonnoidea Suter, 1913 [= Cassoidea, Cassidoidea Latreille, 1825; Charoniacea Pchelintsev & Korobkov, 1960; Cymatiacea Iredale, 1913 & Doliacea Latreille, 1825]
Bursidae Thiele, 1925 [= Ranellidae auctt. non Gray]
Cassidae Latreille, 1825 [= Cassididae d'Orbigny, 1840 & Oocorythidae P. Fischer, 1885]
Perissityidae Popenoe & Saul, 1987 {originally in Buccinoidea}
Personidae Gray, 1854
Ranellidae Gray, 1854 [= Aquilidae Pilsbry, 1904, Charoniadae Pchelintsev & Korobkov, 1960, Cymatiidae Iredale, 1913, Lampusidae Newton, 1891, Lotoriidae Harris, 1897, Nyctilochidae Dall, 1912, Septidae Dall & Simpson, 1901, Simpulidae Dautzenberg, 1900 & Tritonidae Broderip, 1839 non Gray, 1840]
Tonnidae Suter, 1913 [= Doliidae Latreille, 1825, Galeodoliidae Sacco, 1890/1 & Macgillivrayidae Adams & Adams, 1854]
Laubierinoideae Warén & Bouchet, 1990 {fide Riedel, 1995}
Laubierinidae Warén & Bouchet, 1990
Pisanianuridae Warén & Bouchet, 1990 {Beu, 1998, raised from subfamily}
Vanikoroidea Gray, 1840 [= Amalthacea Dall, 1889 & Hipponicoidea Troschel, 1861 Vanicoroidea (sic) auctt.; &= ECHINOSPIRIDA / Echinospiracea Fretter & Graham, 1962 p.p.]
Haloceratidae Warén & Bouchet 1991
Hipponicidae Troschel, 1861 [= Amaltheidae Dall, 1889 non Hyatt, 1867 (Cephalopoda), & Cheileidae Iredale & McMichael, 1962]
Vanikoridae Gray, 1840 [= Caledoniellidae Rosewater, 1969, Lyocyclidae Thiele, 1925, Merriidae Hedley, 1917, Naricidae Récluz, 1845 (not 1846 fide Bouchet & Rocroi, 2001) & Vanicoridae/Vanicoroidae Gray, 1840]
Vermetoidea Rafinesque, 1815 [= Tubulibrachiata & PROTOPODA P. Fischer, 1884 (both p.p.) ]
Vermetidae Rafinesque, 1815
Xenophoroidea Troschel, 1852
?Guttulidae Goryachev, 1987 {placement fide Golikov & Starobogatov, 1988 ex Prosobranchia incertæ sedis.}
Lamelliphoridae Korobkov, 1955 [= Lammelliphoridae (sic), auctt.]
Xenophoridae Troschel, 1852 {& Philippi, 1853/6} [= Onustidae Adams & Adams, 1854 & Phoridae Gray, 1840 (non Curtis, 1833)]

infraorder PTENOGLOSSA Gray, 1853 [= AGLOSSA Thiele, 1925 p.p.; CERITHIOPSOIDEI, COCHLOSOLENIA, COCHLOSYRINGIA, CTENOGLOSSA, ENTEROXENINI p.p., EPITONIIDA, EURYGLOSSA, GYMNOGLOSSA, MELANELLIDA, PARASITA, SINISTROBRANCHIA & TRIPHOROIDEI]
Eulimoidea Troschel, 1853 [= GYMNOGLOSSA Gray, 1853 p.p.; AGLOSSA Thiele, 1925 p.p.; Homoeostropha, Mellanellacea Iredale, 1915, Parasitica & Stylinacea; &= Pyramidellimorpha p.p.]
Eulimidae Troschel, 1853 [= Asterophilidae Thiele, 1925, Entoconchidae Gill, 1871/P. Fischer, 1883, Enteroxenidae Heding & Mandahl-Barth, 1938, Melanellidae Iredale, 1915 & Bartsch, 1917, Paedophoropodidae Ivanov, 1933, Pelseneeridae Rosén, 1910, Rosenidae Nierstrasz, 1913, Strombiformidae Iredale, 1915, Stiliferidae/Styliferidae Adams & Adams, 1853, Thycidae Thiele, 1931 & Turtoniidae Rosén, 1910]
Janthinoidea Lamarck, 1812 [= Aclidoidea Sars, 1878, Epitonioidea Berry, 1910 & Scalacea Adams & Adams, 1853]
Aclididae Sars, 1878 [as Aclidae. = Aclisidae Pchelintsev, 1960]
Epitoniidae Berry, 1910 [= Scalaridae Lamarck, 1812, Scalidae Adams & Adams, 1853 & Stenacmidae Pilsbry, 1945]
Janthinidae Lamarck, 1812 [= Ianthinidae auctt., Iodeidae Leach in Gray, 1847 & Recluziidae Iredale & McMichael, 1962]
Triphoroidea Gray, 1847 [= Cerithiopsoidea Adams & Adams, 1853 & RHINIGLOSSA Sars, 1878]
Cerithiopsidae Adams & Adams, 1853 [= Cerithiellidae Golikov & Starobogatov, 1975 (& Marshall, 1978), & Eumetulidae Golikov & Starobogatov, 1975 & Newtoniellidae Korobkov, 1960]
Sherborniidae Iredale, 1917
Triforidae Jousseaume, 1884 [= Seilidae Golikov & Starobogatov, 1975]
Triphoridae Gray, 1847 [= Laiocochlidae Golikov & Starobogatov, 1987 & Rhinioglossa Sars, 1878]

infraordinal grade NEOGASTROPODA Wenz, 1938 [= STENOGLOSSA Bouvier, 1887; &= BUCCINIFORMES + CONIFORMES auctt.]
?Pyrifusidae ?Bandel, ?Date
Muricoidea da Costa, 1776 [= ATYPOGLOSSA, DUPLOHAMATA, HAMIGLOSSA Gray, 1853 p.p., MURICINA, ODONTOGLOSSA, ORTHODONTA, Purpuracea Children, 1823 & RACHIGLOSSA Gray, 1853 p.p.]
Coralliophilidae Chenu, 1859
Muricidae da Costa, 1776 [= Magilidae Thiele, 1925, Purpuridae Children, 1823 (& Broderip, 1839), Rapanidae Gray,1853, Rapidae Kuroda, 1941, Sarganidae Stephenson, 1923, Thaididae/Thaidae Suter, 1913, Thaisidae Jousseaume, 1888 & Suter, 1900, & Typhidae Cossmann, 1903]
Grade Volutoidea Rafinesque, 1815 {polyphyly unresolved, fide Harasewych et al 1997a} [= Mitracea Swainson, 1831; Strigatellacea Troschel, 1869; RACHIGLOSSA Gray, 1853 p.p. & VOLUTINA]
Cryptochordidae Pchelintsev & Korobkov, 1960
Cystiscidae Stimpson, 1865
Marginellidae Fleming, 1828 [= Porcellanidae Gray, 1853]
Costellariidae MacDonald, 1860 [= Vexillidae Thiele, 1929]
Mitridae Swainson, 1831 [= Turritidae Gray, 1857, Turriculidae Carpenter, 1861, Mitridatae Jousseaume, 1886, Mitraeidae Locard, 1889, Mitroeidea Locard, 1890 & Mitrariidae Carcelles & Williamson, 1951, Strigatellidae Troschel, 1869]
?Pleioptygmatidae Quinn, 1989
Volutidae Rafinesque, 1815
Volutomitridae Gray, 1854 [= Microvolutidae Iredale & McMichael, 1962 & Peculatoridae Iredale & McMichael, 1962]
Olivellidae Golikov & Starobogatov, 1988
Olividae Latreille, 1825 [= Dactylidae Adams & Adams, 1853, Olivancillariidae Golikov & Starobogatov, 1975, ?Vanpalmeriidae Adegoke, 1977 & Zemiridae Iredale, 1924]
Pseudolividae P. Fischer, 1884
Harpidae Bronn, 1849 [non Harpidae Hawle & Corda, 1847 (Trilobita): suppressed]
Strepsiduridae Cossmann, 1901 [= Strepturidae Cossmann, 1901]
Buccinoidea Rafinesque, 1815 [= BUCCININA; RACHIGLOSSA Gray, 1853 p.p.; Columbelloidea Swainson, 1840; Fasciolarioidea Gray, 1853; Pyrenoidea ?Suter, 1913; Turbinelloidea Swainson, 1835 & Beringioidea Golikov & Starobogatov, 1975]
Anachidae Golikov & Starobogatov, 1972
Buccinidae Rafinesque, 1815 [= Austrosiphonidae Cotton & Godfrey, 1932, Babyloniidae Goryachev, 1987, Beringiidae Golikov & Starobogatov, 1975, Buccinulidae Finlay, 1928 (& Powell, 1929), Colidae Cotton & Godfrey, 1932, Colubrariidae, Colusidae Gray, 1857, Cominellidae Gray, 1857, Neptuneidae Stimpson, 1865 (& Troschel, 1869), Pusiostomatidae Iredale, 1940, Pyramimitridae Cossmann, 1901 & Siphonaliidae Goryachev, 1987]
Columbellidae Swainson, 1840 [= Pyrenidae ?Suter, 1913]
Fasciolariidae Gray, 1853 [= Cyrtulidae MacDonald, 1869, Fusidae, Swainson, 1840, Fusinidae, Wrigley, 1927 & Latiridae Iredale, 1929]
Melongenidae Gill, 1867 {& ?1871} [= Busyconidae Wade, 1917, Cassidulidae Gray, 1857 & Galeodidae Thiele, 1925]
Nassariidae Iredale, 1916 [= Alectrionidae Gray, 1847 &?Dall, 1908, Arculariidae Iredale, 1915, Cyclopsidae Chenu, 1859 & Nassidae Swainson, 1840 (all unavailable)]
Turbinellidae Swainson, 1835 {& 1840} [= Columbariidae Dall, 1904, Cynodontidae MacDonald, 1860, Graphidulidae Stephenson, 1941, Ptychatractidae, Pyropsidae Stephenson, 1941, Tudiclidae Cossmann, 1901, Vasidae Adams & Adams, 1853, & Xancidae Pilsbry, 1922 (& Woodring, 1928)]
Cancellarioidea Gray, 1853 [= Nematoglossa]
Cancellariidae Gray, 1853
?Paladmetidae Stephenson, 1941
Conoidea Fleming, 1822 {fide Taylor, Kantor & Sysoev, 1993 & Rosenberg, 1998} [= Terebracea Mörch, 1852, Tomoglossata, Toxifera, TOXOGLOSSA Troschel, 1848, TURRINA & Turroidea Swainson, 1840]
Conidae Fleming, 1822 {as Conusidae} [= Conorbidae De Gregorio, 1890, Cryptoconidae Cossmann, 1896]
Speightiidae Powell, 1942
Terebridae Mörch, 1852 [= Acusidae Gray, 1853 & Pervicaciidae Rudman, 1969]
Turridae Swainson, 1840 [= Clionellidae Stimpson, 1865, Diptychomitridae Bellardi, 1888, Drilliidae Morrison, 1966, Melatomidae Gill, 1871, Mitrolumnidae Sacco, 1904, Pleurotomidae Chenu, 1859, Pseudomelatomidae Morrison, 1966, Raphitomidae Bellardi, 1875, Strictispiridae McLean, 1971, Thatcheriidae Powell, 1942, Turriculidae Blainville, 1824, Turritidae Adams & Adams, 1853 & Turridae Hedley, 1922]

Superorder HETEROBRANCHIA J. E. Gray, 1840 {TRIGANGLIONATA to EUTHYNEURA} [= HETEROSTROPHA sensu Bandel; &=± PENTAGANGLIONATA Hazsprunar, 1985]

?Kuskokwimiidae Frýda, 2001 {Early Devonian}

?Dolomitellidae Bandel, 1994 {Triassic}
?Misurinellidae Bandel, 1994 {Triassic}
?Zardinellidae Bandel, 1994 {Triassic}

Ordinal Grade TRIGANGLIONATA [= ALLOGASTROPODA, & HETEROSTROPHA sensu Ponder & Warén] {Polyphyletic}
Omalogyroidea Sars, 1878 [= PRIONOGLOSSA Sars, 1878]
Omalogyridae Sars, 1878 [Homalogyridae Sars, 1878, emend.]
Pyramidelloidea Gray, 1840 [= AGLOSSA Thiele, 1925 p.p.; GYMNOGLOSSA Gray, 1853 p.p.; & Pyramidellimorpha p.p.]
Amathinidae Ponder, 1987 {& ?1988}
Anisocyclidae van Aartsen, 1995 [= Ebalidae Warén, 1994 ?1995]
Cimidae Warén 1993
Cyclostremellidae Moore, 1966 [= Tjaernoeidae Warén, 1991]
Donaldinidae Bandel, 1996
Heteroneritidae Grundel, 1998
Pyramidellidae Gray, 1840 {& ?d'Orbigny, 1840} [= Obeliscidae Iredale, 1929]
Valvatoidea Gray, 1840 [ECTOBRANCHIA P. Fischer, 1884 & Streptobranchia]
Cornirostridae Ponder, 1990
Hyalogyrinidae Warén & Bouchet, 1993
Orbitestellidae Iredale, 1917 [= Microdisculidae Iredale & McMichael, 1962]
Provalvatidae Bandel, 1991 {Cretaceous}
Valvatidae Gray, 1840 {& Thompson, 1840}
Xylodisculidae Warén, 1992
?Streptacidoidea Knight, 1931
Cassianebalidae Bandel, 1996 {Triassic}
Streptacididae Knight, 1931
Rissoelloidea Gray, 1850 [= RISSOELLINA Gray, 1850 (Golikov & Starobogatov, 1975), & Microrissoidea Nordsieck, 1972 p.p.]
Rissoellidae Gray, 1850 [= Jeffreysiadae Carpenter, 1856 & Jeffreysiidae P. Fischer, 1885]
Architectonicoidea Gray, 1850 [= GYMNOGLOSSA Gray, 1853 p.p.; Mathildoidea Dall, 1889; ?Omalaxoidea Wenz, 1939 & Solariacea Chenu, 1859]
Ampezzanildidae Bandel, 1995 {Triassic}
Amphitomariidae Bandel, 1996 {Triassic}
Anoptychiidae Bandel, 1995 {Triassic}
Architectonicidae Gray, 1850 [= Heliacidae Cotton & Godfrey, 1933, Mangonuidae Iredale, 1936, Solariidae Chenu, 1859, Teretropomidae Rochebrune, 1881 & Toriniidae Troschel, 1875]
Cassianaxidae Bandel, 1996 {Triassic}
Mathildidae Dall, 1889 [?= Anaptychoidae ?sp. sic]
?Omalaxidae Wenz, 1939
Stuoraxidae Bandel, 1996 {Triassic}
?Thysanodontidae Marshall, 1988 {placement fide Golikov & Starobogatov, 1988, ex Trochidae: Thysanodontinae}
Tofanellidae Bandel, 1995 {Triassic}
Trachoecidae Bandel, 1995 {Triassic}
Nerineoidea Zittel, 1873 [= Itieriacea Cossmann, 1896; Nerinellacea Pchelintsev & Korbkov, 1960, Ptygmatisoidea Pchelintsev & Korbkov, 1960 & Ptygmatoidea (sic) auctt.; &=ENTOMOTAENIATA Cossmann, 1896 p.p.]
Aptyxiellidae Akopyan, 1973 {?sp. author=Hacobjan}
Auroraellidae Pchelintsev, 1968
Bactroptyxisidae Pchelintsev, 1968
Contortellidae Lyssenko & Aliev, 1989
Cryptoplocidae Pchelintsev & Korobkov, 1960 [= Cryptoplocusidae Pchelintsev, 1965]
Dalmateidae Dzhalilov, 1977
Diptyxisidae Pchelintsev & Korobkov, 1960
Elatioriellidae Pchelintsev, 1968
Elegantellidae Pchelintsev, 1968
Fibuloptygmatidae Akopyan, 1973
Fibuloptyxisidae Pchelintsev, 1968
Itieriidae Cossmann, 1896 [= Itieridae, pre emend.]
Nerineidae Zittel, 1873 [= Nerinellidae Pchelintsev & Korobkov, 1960 fide Kollman & Peza, 1996; Eunerineidae ?author (post Cox, 1949); &=Umboneidae Lyssenko & Aliev, 1987 & Umboniidae (sic) Kollman & Peza, 1996 sic, non Adams & Adams, 1854]
Phaneroptyxisidae Pchelintsev, 1968
Polyptyxisidae Pchelintsev, 1968
Ptygmatisidae Pchelintsev & Korobkov, 1960 [= Ptygmatidae auctt.]
Simploptyxidae Akopyan, 1973
Triptyxisidae Pchelintsev, 1968
Upellidae Pchelintsev, 1968

Intraorder EUTHYNEURA Spengel, 1881 {OPISTHOBRANCHIA + PULMONATA - monophyletic fide Tholleson, 1999, Yoon & Kim, 2000 and Wade & Mordan, 2000}
Ordinal Grade OPISTHOBRANCHIA Milne Edwards, 1848 [= OPISTHOBRANCHIATA]
Subordinal grade ARCHITECTIBRANCHIA {paraphyletic fide Mikkelsen, 1996} [?= PLEUROCOELA]
Acteonoidea d'Orbigny, 1835 {& ?1842; allied with Heterobranchia by Mikkelsen, 1996}
Acteonidae d'Orbigny, 18352 {& ?1842}
Ringiculoidea Philippi, 1853 {* = moved from Acteonoidea}
Bullinidae Lamarck, 1801*
Hydatinidae Pilsbry, 1893* {& ?1895} [= Aplustridae Gray, 1847]
Ringiculidae Philippi, 1853 {& ?Meek, 1862}
• The following 2 superfamilies contain exlusively fossil taxa (Late Triassic - Eocene) that have characters suggestive of both nerineid and cephalaspid affinities:
?Actaeonelloidea Zilch, 1959
Actaeonellidae Zilch, 1959
Trochacteonidae Akopyan, 1963
?Cylindrobullinoidea Wenz, 1947 {may be part or full synonym of Actaeonelloidea} [= Tubiferacea Cossmann, 1895]
Cylindrobullinidae Wenz, 1947 {art. 40 ICZN precludes emendation to Acteoninidae}
Tubiferidae Cossmann, 1895 [= Ceritellidae Wenz, 1938 & Pseudonerineidae Pchelintsev, 1968] {high-spired: variously placed among the nerineids or cephalaspids}
Sulcoactaeonidae Grundel, 1997 {probably a synonym of Liocareninae/idae}

Suborder CEPHALASPIDEA P. Fischer, 1883 {monophyletic fide Mikkelsen, 1996}
Philinoidea Gray, 1850 [= Philinoglossoidea Hertling, 1932 & Retusoidea Thiele, 1925]
Aglajidae Pilsbry, 1895 [= Doridiidae Gray, 1847 non Dorididae Rafinesque, 1815]
Cylichnidae A. Adams, 1850 {& Adams & Adams, 1854} [= Scaphandridae Sars 1878]
Gastropteridae Swainson, 1840
Philinidae Gray, 1850
Philinoglossidae Hertling, 1932
Plusculidae ?Marcus, 1953 {fide Vaught, 1989: 66}
Retusidae Thiele, 1925 {& ?1926; ?1929; 1931}
Tornatinidae P. Fischer, 1887
Volvulidae ?author {for Volvulella Newton, 1891} [?= Tornatinidae or Cylichnidae]
Bulloidea Lamarck, 1801 [= Haminoeoidea Pilsbry, 1895 fide Mikkelsen, 1996]
Bullidae Lamarck, 1801 {& ?Rafinesque, 1815} [= Bullariidae ?author]
Haminoeidae Pilsbry, 1895 [= Atydidae/Atyidae Thiele, 1925, Atydae Abbott, 1954, Bullactidae Thiele, 1926 & Hamineidae auctt.]
Smaragdinellidae Adams, A. & Reeve, 1848

?Runcinoidea Adams & Adams, 1854
Ildicidae Burn, 1963
Runcinidae Adams & Adams, 1854 {& Gray, 1857} [= Ilbiidae Burn, 1963 & Peltidae Vayssière, 1885 (& Winckworth, 1931) non Coleoptera: Trogossitidae (=Peltidae)]
?Diaphanoidea Odhner, 1914
Diaphanidae Odhner, 1914 {& ?1922}
?Superfamily Uncertain
Notodiaphanidae Thiele, 1931

Suborder ANASPIDEA P. Fischer, 1883 [= APLYSIOMORPHA] {monophyletic fide Mikkelsen 1996}
Akeroidea Mazzarelli, 1891
Akeridae Mazzarelli, 1891 {& Pilsbry, 1893} [= Akeratidae Pilsbry, 1896 & Aceridae auctt.]
Aplysioidea Lamarck, 1809 {& Rafinesque, 1815}
Aplysiidae Lamarck, 1809 {& Rafinesque, 1815} [= Dolabellidae Pilsbry, 1895, Dolabriferidae Pilsbry, 1895 & Notarchidae Eales & Engels, 1935]

Suborder SACOGLOSSA Ihering, 1876 [= ASCOGLOSSA Bergh in Ihering, 1876, & Bergh, 1877; MONOSTICHOGLOSSA Pagenstecher, 1863/1874? (?p.p.); & PELLIBRANCHIATA Alder & Hancock, 1848; &=CONCHOIDINA Gascoigne, 1985 + ACONCHOIDINA Gascoigne, 1985] {Synonyms & classification fide Marcus 1982 & Gascoigne, 1985; suborder monophyletic fide Mikkelsen 1996}
Oxynooidea Adams & Adams, 1854 {& Boettger, 1963} {Shell-bearing as adults} [= Arthessoidea Boettger, 1963; Bertheliniacea Beets, 1949; Conchoidea Gascoigne, 1985; Juliacea, Julioidea Boettger, 1963; Oxynacea, Oxynoacea & Oxynoeidea Auctt.; Tamanovalvida; Volvatellacea Pilsbry, 1895 & suborder VOLVATELLINI Pilsbry, 1895]
Juliidae Smith, 1885 [= Bertheliniidae Beets, 1949 & Tamanovalvidae Kawaguti & Baba, 1959] {so-called 'bivalved gastropods'}
Oxynoidae Adams & Adams, 1854 {& Stoliczka, 1868} [= Lobigeridae Pruvot-Fol, 1954]
Volvatellidae Pilsbry, 1895 [= Arthessidae Boettger, 1963 & ?Ascobullidae ?author]
Cylindrobulloidea Thiele, 1931 {moved from CEPHALASPIDEA fide Mikkelsen, 1996} {Shell-bearing as adults}
Cylindrobullidae Thiele, 1926 {& 1931}
Elysioidea Forbes & Hanley, 1851 {& Adams & Adams, 1854, Bergh, 1872; Shell-less as adults} [= Aconchoidea Gascoigne, 1985 p.p.; Plakobranchacea Rang, 1829 & Plakobranchoidea (Rang, 1829); Pellibranchiata Alder & Hancock, 1855 & Suborder Platyhedyloidea Rankin, 1979]
Boselliidae Marcus, 1982
Elysiidae Forbes & Hanley, 1851 {TT&E gives the family-name author as Adams & Adams, 1854, Marcus gives Bergh, 1872} [= Plakobranchidae Rang, 1829]
Platyhedylidae Salvini-Plawen, 1973 [= Gascoignellidae Jensen, 1985]
Limapontioidea Gray, 1847 {Shell-less as adults} [= Aconchoidea Gascoigne, 1985 p.p.; Stiligeroidea Iredale & O'Donoghue, 1923 & suborder POLYBRANCHIACEA Adams & Adams, 1854]
Caliphyllidae Thiele 1912 [= Polybranchiidae Adams & Adams, 1854 & ?O'Donoghue, 1929]
Costasiellidae K. B. Clark, 1984
Hermaeidae Adams & Adams, 1854 [Vaught, 1989, synonymises this with the Stiligeridae (=Limapontiidae herein)]
Limapontiidae Gray, 1847 [= Alderiidae ?Gascoigne, 1978, Oleidae Thiele, 1926 & Stiligeridae Iredale & O'Donoghue, 1923]

Suborder ACOCHLIDEA Odhner, 1939 {shell-less; freshwater & marine, interstitial} [= ACOCHLIDIACEA Odhner, 1939, & Marcus, 1953; ACOCHLIDIOIDEA Taylor & Sohl, 1962; ACOCHLIDIIFORMES; EUACOCHLIDIACEA Franc, 1969; HEDYLACEA Odhner, 1937; PALLIOHEDYLOIDEI; &= HEDYLOPSOIDEI p.p.; & (with PHILINOGLOSSOIDEA q.v. + PLATYHEDYLOIDEA q.v.) = CERATOBRANCHIA Rankin, 1979]
Acochlidioidea Odhner, 1937 [= Euacochlidioidea Franc, 1968, Hedylopsoidea Odhner, 1952 & Minichevielloidea Starobogatov, 1983; &= suborders PEDONEURA & PROPRIONEURA both Rankin, 1979]
Acochlidiidae Odhner, 1937
Hedylopsidae Odhner, 1952
Minicheviellidae Starobogatov, 1983
Palliohedylidae Rankin, 1979
Pseudunelidae Rankin, 1979
Strubellidae Rankin, 1979
Microhedyloidea Odhner, 1937 [= Avelariacea Rankin, 1979; Ganitoidea Rankin, 1979; Velariacea Rankin, 1979 & ?= Livornielloidea Rankin, 1979; &= suborders CEREBRONEURA & ?VISCERONEURA both Rankin, 1979]
Asperspinidae Rankin, 1979
?Livorniellidae Rankin, 1979
Microhedylidae Odhner, 1937 [= Ganitidae Rankin, 1979 (=Ganatidae sic) & Parhedylidae Thiele, 1932 p.p.]
Pontohedylidae Starobogatov, 1983 [= Mancohedylidae Rankin, 1979]
Sabulincolidae Rankin, 1979
Unelidae Rankin, 1979
Tantuloidea Rankin, 1979 {chiefly distinguished by arrangement of nervous and reproductive sytems, fide Rankin, 1979} [= suborder PHARYNGONEURA Rankin, 1979]
Tantulidae Rankin, 1979

Suborder RHODOPEMORHA Salvini Plawen, 1991
Rhodopidae Kolliker, 1847 [= Rhodopida auctt. non P. Fischer, 1883: 547 (Rhodopidæ, sic)]

Suborder THECOSOMATA Blainville, 1823/4 [= PTEROPODA Cuvier, 1804 p.p.]
Infraorder EUTHECOSOMATA Meisenheimer, 1905
Limacinoidea Blainville, 1823 [= Spiratellacea Dall, 1921 & ?Zilch, 1959]
Cavoliniidae d'Orbigny, 1842 {& Gray, J.E., 1850 & Adams & Adams, 1854} [= Cuvieridae / Cuvierinidae Gray, 1840]
Limacinidae Blainville, 1823 {?Bosc, 1817} [= Spiratellidae Dall, 1921]
Sphaerocinidae Janssen & Maxwell 1995
Infraorder PSEUDOTHECOSOMATA Meisenheimer, 1905
Peraclidoidea Johnson, 1915
Cymbuliidae Gray, 1840 {no calcareous shell as adult}
Desmopteridae Chun, 1889 {?1899; shell-less}
Peraclidae Tesch, 1913 [= Peraclididae Johnson, 1915 & Procymbuliidae ?author]

Suborder GYMNOSOMATA Blainville, 1824 [= PTEROPODA Cuvier, 1804 p.p.] {shell-less as adult}   {Tholleson, 1999b found caenogastropod affinities in gymnosome 16S rRNA}
Infraorder GYMNOSOMATA Blainville, 1824
Clionoidea Rafinesque, 1815
Clionidae Rafinesque, 1815 {& ?Oken, 1815} [non Clionidae Gray, 1867 (Porifera); = Cliidae P. Fischer, 1883]
Cliopsidae Costa, 1873 [= Clionopsidae Pelseneer, 1887]
Laginiopsidae Pruvot-Fol, 1922
Notobranchaeidae Pelseneer, 1886
Pneumodermatidae Latreille, 1825
Thliptodontidae Kwietniewski, 1902
Infraorder GYMNOPTERA
Hydromyloidea Pruvot-Fol, 1942
Hydromylidae Pruvot-Fol, 1942 [= Anopsiidae Hoffmann, 1931; Eurybiidae P. Fischer, 1883 (emended from Euribia) & Halopsychidae Pelseneer, 1885]

[NOTASPIDEA + NUDIBRANCHIA = ACOELA Thiele, 1926]

Suborder NOTASPIDEA P. Fischer, 1883 [= PLEUROBRANCHOMORPHA]
Tylodinoidea Gray, 1847 [= Umbraculoidea Dall, 1889]
Bertiniidae ?author
Tylodinidae Gray, 1847
Umbraculidae Dall, 1889
Pleurobranchoidea Férussac, 1822 {& Menke, 1828}
Pleurobranchidae Férussac, 1822 {& Menke, 1828}

Suborder NUDIBRANCHIA Blainville, 1814 {shell-less post-larvally}
Infraorder ANTHOBRANCHIA Férussac, 1819 [= HOLOHEPATICA Bergh, 1881, DORIDINA Odhner, 1934 & DORIDOIDEA]
Onchidoridoidea Alder & Hancock, 1845 [= Anadoridoidea Odhner, 1934; & Phanerobranchia P. Fischer, 1883 (non Ihering, 1876)]
Aegiretidae P. Fischer, 1883 {as Aegirinae (sic)} [= Notodorididae Eliot, 1910]
Corambidae Bergh, 1871 {?1892} [= Hypobranchiaeidae P. Fischer, 1883]
Fucolidae Pruvot-Fol, 1933
Goniodorididae Adams & Adams, 1854 [= Okeniidae Iredale & O'Donoghue, 1923]
Gymnodorididae Odhner, 1941 [= Nembrothidae ?author]
Onchidorididae Alder & Hancock, 1845 {& ?Gray, 1853/1854} [= Calycidorididae Roginskaya, 1972, Lamellidorididae Pruvot-Fol, 1954 & Pseudodorididae Eliot, 1910]
Triophidae Odhner, 1941 [= Kaloplocamidae Pruvot-Fol, 1954]
Vayssiereidae Thiele, 1931 [= Okadaiidae Baba, 1931]
Doridoidea Rafinesque, 1815 {*=status uncertain fide Beesley, Ross & Wells, 1998} [= Eudoridoidea Odhner, 1934; Cryptobranchia P. Fischer, 1883 & Porodoridoidea Odhner in Franc, 1965 (=Porostomata Bergh, 1892, Dendrodoridoidea O'Donoghue, 1924 & Phyllidioidea Rafinesque, 1815)]
Actinocyclidae Pruvot-Fol, 1934*
Aldisidae Odhner, 1939* [= Thorunnidae Odhner, 1926]
Archidorididae Bergh, 1891* [= Archiodoridae Bergh, 1892 & Archidoridae (sic)]
Asteronotidae Thiele, 1931
Baptodorididae Odhner, 1926*
Cadlinidae Bergh, 1891 [= Echinochilidae Odhner, 1968]
Chromodorididae Bergh, 1891 {& 1892} [= Glossodorididae O'Donoghue, 1924a & Miamiridae Bergh, 1891]
Conualeviidae Collier & Farmer, 1964
Dendrodorididae O'Donoghue, 1924 [= Doriopsidae Bergh, 1876a & Doridopsidae Alder & Hancock]
Discodorididae Bergh, 1891* [= Diaululidae Bergh, 1892]
Dorididae Rafinesque, 1815 [?= Doridigitatidae Iredale & O'Donoghue, 1923]
Geitodorididae Odhner, 1968*
Halgerdidae Odhner, 1926 {sometimes synonymised with Asteronotidae q.v.}
Hexabranchidae Bergh, 1891
Homoeodorididae Odhner, 1926 [= Homoiodorididae auctt.]
?Iduliidae ?author {also placed in the Aeolidioidea &? syn. Dotoidae}
Kentrodorididae Bergh, 1891 {& ?1892} [= Centrodorididae err.]
Mandeliidae Valdes & Gosliner, 1999
Phyllidiidae Rafinesque, 1815 {?1814} [= Fryeriidae Baranetz & Minichev, 1994]
Platydorididae Bergh, 1891*
Rostangidae Pruvot-Fol, 1951
Polyceroidea Alder & Hancock, 1845
Polyceridae Alder & Hancock, 1845 [= Polyceratidae Alder & Hancock, 1845 & Euphuridae Iredale & O'Donoghue, 1923]
Doridoxoidea Bergh, 1900 {united by Schroedl et al, 2001 with CLADOBRANCHIA in unranked taxon Dexiarchia} [= Gnathodoridoidea Odhner, 1968, Bathydoridoidea Bergh, 1891, DORIDOXIDA]
Bathydorididae Bergh, 1891
Doridoxidae Bergh, 1900 [= Doridomorphidae ?Odhner, 1968, Doridoeididae ?author & Doridoididae ?author]

Infraorder CLADOBRANCHIA Willan & Morton, 1984 [= AEOLIDINA Odhner, 1934, AEOLIDIOIDEA, ARMININA Odhner, 1934, ARMINOIDEA, DENDRONOTOIDEA Odhner, 1934 & DENDRONOTINA Odhner, 1934]
Dendronotoidea Allman, 1845 {& J. E. Gray, 1857}
Bornellidae P. Fischer, 1883
Dendronotidae Allman, 1845 {?Sars, 1878}
Dotoidae Gray, 1853 [= Dotidae auctt.]
Embletoniidae Pruvot-Fol, 1954 {also placed in the Aeolidioidea}
Hancockiidae MacFarland, 1923
Lomanotidae Bergh, 1890
Marianinidae ?Odhner, 1968
Phylliroidae Férussac, 1821 [= Psilosomata Blainville,1825 & Phyllirhoidae P. Fischer, 1883]
Scyllaeidae Linnaeus, 1758 {& Alder & Hancock, ?1855/1864; ?Bergh, 1892}
Tethydidae Rafinesque, 1815 [= Tethyidae P. Fischer, 1883 & Fimbriidae ?author (non Nicol, 1950: Bivalvia: Lucinoidea), Melibidae Ihering, 1876, Tethidae Alder & Hancock, ?1864, Tethymelibidae Bergh, 1892]
Tritoniidae Lamarck, 1809 {& Children, 1823; Menke, 1828; Adams & Adams, 1858} [= Duvaucellidae ?author]
Arminoidea Rafinesque, 1814 [= Euarminoidea Odhner in Franc 1968]
Arminidae Rafinesque, 1814 {& Iredale & O'Donoghue, 1923, ?Pruvot-Fol, 1927} [= Atthilidae Bergh, 1900, Pleuroleuridae & Pleurophyllidiidae P. Fischer, 1883]
Heterodorididae Verrill & Emerton, 1882 {& P. Fischer, 1883} [= Dermatobranchidae P. Fischer, 1883]
Metarminoidea Odhner in Franc, 1968 [= Metaminoidea B. R. & W., 1998 sic]
Charcotiidae Odhner, 1926 [= Lemindidae Griffiths, R. J., 1985]
Dironidae Eliot, 1910
Goniaeolididae Odhner, 1907
Heroidae Bergh, 1892
Madrellidae Vayssière, 1909
Metarminidae Odhner in Franc, 1968 {?synonymy}
Zephyrinidae Iredale & O’Donoghue, 1923 {& ?O'Donoghue, 1924} [= Antiopellidae Hoffmann, 1938, Janidae Bergh, ?date, Janolidae Pruvot-Fol, 1954, Pinufiidae ?Marcus, 1960 & Proctonotidae Gray, 1853]
Aeolidioidea Gray, 1827 [= Aeolidoidea (sic), Euaeolidioidea Odhner in Franc, 1968]
Aeolidiidae Gray, 1827 {& d'Orbigny, 1839 (not 1834)} [= Protaeolidiellidae Odhner in Franc, 1968]
Babakinidae Roller, 1972
Calmidae Iredale & O'Donoghue, 1923
Caloriidae Odhner in Franc, 1968
Coryphellidae Bergh, 1889
Cratenidae Bergh, 1890
Cumanotidae Odhner in Franc, 1968
Eubranchidae Odhner, 1934
Fionidae Alder & Hancock, 1855
Flabellinidae Bergh in Carus, 1890 {?1889}
Glaucidae Oken, 1815 {& Gray, 1827} [= Facelinidae & Favorinidae both Bergh in Carus, 1889]
Herviellidae Odhner in Franc, 1968
Myrrhinidae Bergh, 1905
Nossidae Odhner in Franc, 1968
Notaeolidiidae Eliot, 1910
Paracoryphellidae Miller, 1971
Phidianidae Odhner, 1968
Pleurolidiidae Burn, 1966
Pseudovermidae Thiele, 1931
Pteraeolidiidae Risbec, 1953
Spurillidae Odhner, 1939
Tergipedidae Vayssiere, 1888 {& Bergh, 1889} [= Cuthonidae Odhner, 1934 (& 1939), Piseinotecidae Edmunds, 1970 & Trinchesiidae Nordsieck, 1972]

Order PULMONATA Cuvier, 1817 {monophyletic fide Wade & Mordan, 2000; incl. GYMNOMORPHA}
Subordinal grade SYSTELLOMMATOPHORA {polyphyletic fide Wade & Mordan, 2000} [= SOLEOLIFERA p.p.; GYMNOMORPHA auctt.]
Otinoidea Adams & Adams, 1855 [= OTINOIDEI]
Otinidae Adams & Adams, 1855 {& Chenu, 1859}
Smeagolidae Climo, 1980
Onchidoidea Gray, 1824
Onchidiidae Gray, 1824 [= Oncidiidae P. Fischer, 1883]
Rathouisioidea Sarasin, 1899 [= Veronicellacea & Soleolifera]
Rathouisiidae Sarasin, 1899
Veronicellidae Gray, 1840 [= Vaginulidae P. Fischer, 1883]

Subordinal Grade BASOMMATOPHORA Keferstein, 1864
Amphiboloidea Gray, 1840
Amphibolidae Gray, 1840 {& Adams & Adams, 1855}

Acroloxoidea Thiele, 1931
Acroloxidae Thiele, 1931
Chilinoidea Adams & Adams, 1855
Chilinidae Adams & Adams, 1855
Latiidae P. Fischer, 1883
Siphonarioidea Gray, 1840
Siphonariidae Gray, 1840
Lymnaeoidea Rafinesque, 1815 [= LYMNOPHILA (?p.p.); Physoidea & Planorbioidea]
Ancylidae Rafinesque, 1815 [= Rhodacmeidae ?author]
Bulinidae Oken, 1815 [= Bullinidae Vaught, 1989 err. pro]
Lancidae Hannibal, 1914
Lymnaeidae Rafinesque, 1815 {not Lamarck, 1812 (ICZN Opinion 495, 1957)}
Neoplanorbidae Hannibal, 1912
Physidae Fitzinger, 1833
Patelloplanorbidae ?Hubendick, 1957
Planorbidae Rafinesque, 1815 {& Gray, 1840}
Protancylidae Walker, 1923
Glacidorboidea Ponder, 1986
Glacidorbidae Ponder, 1986

Suborder EUPULMONATA {paraphyletic fide Wade & Mordan, 2000}
Infraorder ACTOPHILA [= ARCHAEOPULMONATA Morton, 1955]
Melampoidea Stimpson, 1851 [= Ellobioidea & Auriculoidea]
Carychiidae Jeffreys, 1830
Leucophytiidae ?author
Melampidae Stimpson, 1851 [= Ellobiidae Adams & Adams, 1854/5]
Mesocochliopidae Yu, 1987
Zaptychiidae Zilch, 1959

Infraorder TRIMUSCULIFORMES
Trimusculoidea Zilch, 1959
Trimusculidae Zilch, 1959 [= Gadiniidae P. Fischer, 1883]

Infraorder STYLOMMATOPHORA Schmidt, 1856{monophyletic fide Wade & Mordan, 2000} [= ELASMOGNATHA, LIMACIFORMES & MESURETHRA p.p.]
Subinfraorder ORTHURETHRA
Achatinelloidea Gulick, 1873
Achatinellidae Gulick, 1873 [= Helicteridae P. Fischer, 1883; ?= Pacificellidae Steenberg, 1925]
Cochlicopoidea Pilsbry, 1900 [= Cionelloidea]
Amastridae Pilsbry, 1911
Azecidae Watson, 1920
Cochlicopidae Pilsbry, 1900 [= Cionellidae ?author]
Pupilloidea Turton, 1831
Argnidae Hudec, 1965
Chondrinidae Steenburg, 1925
Lauriidae Steenberg, 1925
Orculidae Pilsbry, 1918
Pleurodiscidae Wenz, 1923
Pupillidae Turton, 1831
Pyramidulidae Kennard & Woodward, 1914
Strobilopsidae Pilsbry, 1918
Valloniidae Morse, 1864 {?Pilsbry, 1900}
Vertiginidae Fitzinger, 1833 {?Stimpson, 1851}
Partuloidea Pilsbry, 1900
Partulidae Pilsbry, 1900
Subinfraorder SIGMURETHRA
Buliminoidea Clessin, 1879
Buliminidae Clessin, 1879 {?Pfeiffer, 1879} [= Enidae Woodward, 1903, p.p.]
Cerastuidae Wenz, 1923 [= Enidae Woodward, 1903, p.p.]
Clausilioidea Mörch, 1864
Clausiliidae Mörch, 1864
Triptychiidae ?author
Orthalicoidea Albers-Martens, 1860 [= Bulimulacea P. Fischer, 1883]
Amphibulimidae Crosse & Fischer, 1873
Anadromidae Zilch, 1959
Cerionidae Pilsbry, 1901 [= Ceriidae]
Coelociidae Nordsieck, 1986
Grangerellidae Russel, 1931
Megaspiridae Pilsbry, 1904 [= Coelociontidae Iredale, 1937]
Microceramidae Pilsbry, 1903
Odontostomidae Pilsbry & Vanatta, 1898
Orthalicidae Albers-Martens, 1860 [= Bulimulidae P. Fischer, 1883]
Urocoptidae Pilsbry & Vanatta, 1898 {?1896} [= Cylindrellidae P. Fischer, 1883 (from Cylindrella Pfeiffer, 1840 non Swainson, 1840)]
Achatinoidea Swainson, 1840
Achatinidae Swainson, 1840
Coeliaxidae Pilsbry, 1907
Ferrussaciidae Bourguignat, 1883 {sic, from a misspelling of Férussac}
Glessulidae Schileyko, 1996
Subulinidae Fischer & Crosse, 1877 {not Thiele, 1931}
Thyrophorellidae Thiele, 1926
Aillyoidea Baker, 1930
Aillyidae Baker, 1930
Oleacinoidea Adams & Adams, 1855
Oleacinidiae Adams & Adams, 1855
Spiraxidae Baker, 1939
Testacellidae Gray in Turton, 1840
Streptaxoidea Gray, 1806
Streptaxidae Gray, 1806
Strophocheiloidea Thiele, 1926
Dorcasiidae Thiele, 1926
Megalobulimidae Leme, 1973
Strophocheilidae Thiele, 1926
Acavoidea Pilsbry, 1895
Acavidae Pilsbry, 1895
Caryodidae Thiele, 1926
Macrocyclidae Thiele, 1926
Megomphicidae Baker, 1930 [= Ammonitellidae ?author]
Rhytidoidea Pilsbry, 1893
Aperidae ?author [= Chlamydephoridae Cockerell, 1935]
Haplotrematidae Baker, 1925 [= Selenitidae P. Fischer, 1883]
Rhytididae Pilsbry, 1893 [?1895; = Paryphantidae ?author]
Systrophiidae Thiele, 1926 [= Scolodontidae Baker, 1925]
Plectopylidoidea Moellendorf, 1900
Plectopylididae Moellendorf, 1900 [= Corillidae ?author]
Sculptariidae ?Vaught, 1989
Arionoidea Gray in Turton, 1840
Arionidae Gray in Turton, 1840
Philomycidae Gray, 1847 [= ?Philiomycidae (sic) ?err.]
Punctoidea Morse, 1864 [= Endodontoidea Pilsbry, 1895]
Charopidae Hutton, 1884
Discidae Thiele, 1931
Endodontidae Pilsbry, 1895
Helicodiscidae Baker, 1927
Oopeltidae Cockerell, 1891
Oreohelicidae Pilsbry, 1939
Otoconchidae Cockerell, 1893
Patulidae Tryon, 1866
Punctidae Morse, 1864
Sagdidoidea Pilsbry, 1895 [= Sagdoidea sic]
Sagdidae Pilsbry, 1895 [= Sagdididae sic Tracey, Todd & Erwin, 1993]

{Arrangement of "LIMACOIDEA" sensu lato (Limacoidea - Helixarionoidea) fide Hausdorf, 1998.}
Limacoidea Rafinesque, 1815 [= Vitrinoidea Fitzinger, 1833]
Agriolimacidae Wagner, 1935
Bielziidae Likharev & Wiktor, 1980
Boetgerillidae Van Goethem, 1972
Limacidae Rafinesque, 1815
Plutoniidae Cockerell, 1893 {Wiktor & Backeljau, 1995}
Thyphorellidae ?author
Vitrinidae Fitzinger, 1833
Staffordioidea Thiele, 1931
Staffordiidae Thiele, 1931
Dyakioidea Gude & Woodward, 1921
Dyakiidae Gude & Woodward, 1921 {& Laidlaw, 1931}
Gastrodontoidea Tryon, 1866
Chronidae Thiele, 1931
Daudebardiidae Kobelt, 1906 {& Pilsbry, 1908}
Euconulidae Baker, 1928 {& ?Strebel & Pfeffer}
Gastrodontidae Tryon, 1866
Pristilomatidae Cockerell, 1891
Trochomorphidae Möellendorf, 1890
Vitreidae Thiele, 1931
Trigonochlamydoidea Hesse, 1882 [= Papillodermoidea Wiktor, Martin & Castillejo, 1990, & Parmacelloidea Gray, 1860]
Milacidae Ellis, 1926 {Germain, 1930}
Papillodermidae Wiktor, Martin & Castillejo, 1990 [non Papillodermatidae (sic) auctt.]
Parmacellidae Gray, 1860
Trigonochlamydidae Hesse, 1882
Zonitoidea Mörch, 1864
Zonitidae Mörch, 1864
Helixarionoidea Bourguignat, 1877 [= Helicarionoidea]
Ariophantidae Godwin-Austen, 1888 {Germain, 1921}
Cystopeltidae ?Vaught, 1989
Helixarionidae Bourguignat, 1877 [= Helicarionidae Bourguignat, 1883, & Godwin-Austen, 1883]
Sesaridae Thiele, 1931 {sometimes treated as a subfamily of the Helixarionidae}
Urocyclidae Simroth, 1889

Polygyroidea Pilsbry, 1894/5 [= Mesodontoidea Tryon, 1866]
Polygyridae Pilsbry, 1894/5 {?1940} [= Mesodontidae Tryon, 1866]
Thysanophoridae Pilsbry, 1926
Camaenoidea Pilsbry, 1895
Camaenidae Pilsbry, 1895
Solaropsidae Nordsieck, 1986
Helicoidea Rafinesque, 1815 [= Xanthonychoidea Strebel & Pfeffer, 1880]
Cochlicellidae Schileyko, 1972 {from Cochlicellinae (Hygromiidae)}
Elonidae Gittenberger, 1977
Eulotidae Moellendorf, 1898 [= Bradybaenidae Pilsbry, 1934]
Helicidae Rafinesque, 1815
Hygromiidae Tryon, 1866 {& ?Geyer, 1909} [= Helicellidae ?Adams & Adams, 1855 / Chenu, 1859 / Ihering, 1909 / Hesse, 1926]
Monadeniidae Nordsieck, 1987 {Schileyko, 1996}
Sphincterochilidae Zilch, 1960
Trissexodontidae Nordsieck, 1987
Xanthonychidae Strebel & Pfeffer, 1880 [?= Helminthoglyptidae Pilsbry, 1939]

?Succineoidea Beck, 1837 [= HETERURETHRA]
Succineidae Beck, 1837

?Athoracophoroidea P. Fischer, 1883 [= TRACHEOPULMONATA]
Athoracophoridae P. Fischer, 1883

Reference(s):