Achatina (Lissachatina) fulica Bowdich, 1822 accepted as Lissachatina fulica (Bowdich, 1822) (additional source)
Achatina concentrica Reeve, 1849 accepted as Leptinaria lamellata concentrica (Reeve, 1849) accepted as Leptinaria unilamellata concentrica (Reeve, 1849) (source of synonymy)
Achatina dactylus Broderip, 1832 accepted as Euglandina striata (O. F. Müller, 1774) (source of synonymy)
Achatina lamellata Potiez & Michaud, 1838 accepted as Leptinaria unilamellata (A. d'Orbigny, 1838) (source of synonymy)
Acroloxus culicoides (A. d'Orbigny, 1835) (basis of record)
Allopeas gracile (T. Hutton, 1834) (additional source)
Allopeas micra (A. d'Orbigny, 1835) (additional source)
Andesipyrgus sketi Hershler & Velkovrh, 1993 (additional source)
Anodonta (Glabaris) hidalgoi Germain, 1908 accepted as Anodontites elongata (Swainson, 1823) (source of synonymy)
Anodonta napoensis I. Lea, 1868 accepted as Anodontites crispata Bruguière, 1792 (source of synonymy)
Anodonta pastasana Clessin, 1879 accepted as Anodontites tenebricosa (I. Lea, 1834) (source of synonymy)
Anodontites carinata (Dunker, 1858) (additional source)
Anodontites crispata Bruguière, 1792 (additional source)
Anodontites elongata (Swainson, 1823) (additional source)
Anodontites tenebricosa (I. Lea, 1834) (additional source)
Anodontites tortilis (I. Lea, 1852) (additional source)
Anodontites trapesialis (Lamarck, 1819) (additional source)
Anodontites trigona (Spix, 1827) (basis of record)
Aperostoma (Aperostoma) olivaceum Bartsch & J. P. E. Morrison, 1942 accepted as Incidostoma quitense (L. Pfeiffer, 1852) (source of synonymy)
Aperostoma olivaceum Bartsch & J. P. E. Morrison, 1942 accepted as Incidostoma quitense (L. Pfeiffer, 1852) (source of synonymy)
Archecharax cousini (Jousseaume, 1887) (additional source)
Aroapyrgus colombiensis Malek & M. D. Little, 1971 (additional source)
Asolene crassa (Swainson, 1823) (additional source)
Bartlettia stefanensis (J. Moricand, 1856) (additional source)
Beckianum beckianum (L. Pfeiffer, 1846) (additional source)
Belocaulus boetzkesi (K. Miller, 1879) (basis of record)
Biomphalaria cousini Paraense, 1966 (additional source)
Biomphalaria equatoria (Cousin, 1887) (additional source)
Biomphalaria peregrina (A. d'Orbigny, 1835) (additional source)
Biomphalaria sericea (Dunker, 1848) (additional source)
Bocourtia (Kuschelenia) aequatoria (L. Pfeiffer, 1853) represented as Bocourtia aequatoria (L. Pfeiffer, 1853) (basis of record)
Bocourtia (Kuschelenia) anthisanensis (L. Pfeiffer, 1854) represented as Bocourtia anthisanensis (L. Pfeiffer, 1854) (basis of record)
Bocourtia (Kuschelenia) caliginosa (Reeve, 1849) accepted as Naesiotus quitensis (L. Pfeiffer, 1848) (basis of record)
Bocourtia (Kuschelenia) cotopaxiensis (L. Pfeiffer, 1853) represented as Bocourtia cotopaxiensis (L. Pfeiffer, 1853) (basis of record)
Bostryx alausiensis (Cousin, 1887) (basis of record)
Bostryx bilineatus (G. B. Sowerby I, 1833) (additional source)
Bostryx juana (Cousin, 1887) (basis of record)
Bourciera fraseri (L. Pfeiffer, 1859) (additional source)
Bourciera helicinaeformis (L. Pfeiffer, 1852) (additional source)
Bourciera striatula K. Miller, 1879 (additional source)
Bourciera viridissima K. Miller, 1879 (additional source)
Bulimulus (Paracochlea) willineri Hylton Scott, 1967 accepted as Simpulopsis citrinovitreus (S. Moricand, 1836) (source of synonymy)
Bulimus (Otostomus) napo Angas, 1878 accepted as Drymaeus quadrifasciatus (Angas, 1878) (source of synonymy)
Bulimus boussingaultii Hupé, 1857 accepted as Sultana atramentaria (L. Pfeiffer, 1855) (source of synonymy)
Bulimus caliginosus Reeve, 1849 accepted as Naesiotus quitensis (L. Pfeiffer, 1848) (source of synonymy)
Bulimus catlowiae L. Pfeiffer, 1853 accepted as Naesiotus quitensis (L. Pfeiffer, 1848) (source of synonymy)
Bulimus chamaeleon L. Pfeiffer, 1855 accepted as Drymaeus ambustus (Reeve, 1849) (source of synonymy)
Bulimus cuencanus L. Pfeiffer, 1858 accepted as Opeas cuencanum (L. Pfeiffer, 1858) (source of synonymy)
Bulimus cuneus L. Pfeiffer, 1854 accepted as Protobeliscus fairmaireanus (Petit de la Saussaye, 1853) (source of synonymy)
Bulimus elegantissimus Mousson, 1873 accepted as Drymaeus felix (L. Pfeiffer, 1862) (source of synonymy)
Bulimus fulguratus K. Miller, 1878 accepted as Leiostracus webberi Pilsbry, 1939 (source of synonymy)
Bulimus gloriosus L. Pfeiffer, 1862 accepted as Sultana deburghiae (Reeve, 1859) (source of synonymy)
Bulimus grevillei L. Pfeiffer, 1875 accepted as Porphyrobaphe iostoma (G. B. Sowerby I, 1824) (source of synonymy)
Bulimus inaequalis L. Pfeiffer, 1857 accepted as Drymaeus andai Jousseaume, 1898 (source of synonymy)
Bulimus irregularis L. Pfeiffer, 1848 accepted as Naesiotus quitensis (L. Pfeiffer, 1848) (source of synonymy)
Bulimus jatesi Hupé, 1857 accepted as Sultana kellettii (Reeve, 1850) (source of synonymy)
Bulimus jungairinoi Hidalgo, 1867 accepted as Sultana kellettii (Reeve, 1850) (source of synonymy)
Bulimus lautus A. Gould, 1856 (source of synonymy)
Bulimus loxensis var. minor L. Pfeiffer, 1853 (source of synonymy)
Bulimus maracaibensis (L. Pfeiffer, 1856) accepted as Orthalicus maracaibensis L. Pfeiffer, 1856 accepted as Orthalicus zebra (O. F. Müller, 1774) (basis of record)
Bulimus phasianella Valenciennes, 1827 accepted as Porphyrobaphe iostoma (G. B. Sowerby I, 1824) (source of synonymy)
Bulimus saturnus L. Pfeiffer, 1860 accepted as Porphyrobaphe saturnus (L. Pfeiffer, 1860) (additional source)
Calaperostoma bourcieri (L. Pfeiffer, 1852) (additional source)
Calaperostoma cousini (Jousseaume, 1884) (additional source)
Calaperostoma cumingii (G. B. Sowerby I, 1832) (additional source)
Calaperostoma esmeraldense (K. Miller, 1879) (additional source)
Calaperostoma guayaquilense (G. B. Sowerby I, 1850) (additional source)
Calaperostoma hidalgoi (Crosse, 1866) (additional source)
Calaperostoma nigrofasciatum (K. Miller, 1879) (additional source)
Calaperostoma purum (Forbes, 1850) (additional source)
Calaperostoma rosenbergi (S. I. Da Costa, 1898) (additional source)
Castalia ambigua Lamarck, 1819 (additional source)
Castalia crosseana Hidalgo, 1865 (additional source)
Castalia ecarinata Mousson, 1869 (additional source)
Castalia pazi Hidalgo, 1868 accepted as Diplodon guaranianus (A. d'Orbigny, 1835) (source of synonymy)
Clathrorthalicus corydon (Crosse, 1869) (additional source)
Clathrorthalicus magnificus (L. Pfeiffer, 1848) (additional source)
Clathrorthalicus phoebus (L. Pfeiffer, 1863) (additional source)
Clausilia (Nenia) deyrollei Ancey, 1895 accepted as Columbinia perezi (Jousseaume, 1887) (source of synonymy)
Clypeolum latissimum (Broderip, 1833) (additional source)
Cochliopina boetzkesi (K. Miller, 1879) accepted as Littoridina boetzkesi (K. Miller, 1879) (basis of record)
Cochliopina ecuadoriana (K. Miller, 1879) accepted as Littoridina ecuadoriana (K. Miller, 1879) (basis of record)
Colosius confusus Gomes, D. G. Robinson, F. J. Zimmerman, Obregón & Barr, 2013 (basis of record)
Colosius festae (Colosi, 1921) (additional source)
Colosius propinquus (Colosi, 1921) (basis of record)
Colosius pulcher (Colosi, 1921) (additional source)
Columbinia (Columbinia) cocaensis (Jousseaume, 1900) represented as Columbinia cocaensis (Jousseaume, 1900) (additional source)
Columbinia (Columbinia) perezi (Jousseaume, 1887) represented as Columbinia perezi (Jousseaume, 1887) (additional source)
Columbinia (Steatonenia) cousini (Jousseaume, 1900) represented as Columbinia cousini (Jousseaume, 1900) (additional source)
Columbinia (Steatonenia) reyrei (Jousseaume, 1887) represented as Columbinia reyrei (Jousseaume, 1887) (additional source)
Corbicula fluminea (O. F. Müller, 1774) (additional source)
Cornu aspersum (O. F. Müller, 1774) (additional source)
Corona pfeifferi (Hidalgo, 1869) (additional source)
Corona pfeifferi cincta Strebel, 1909 accepted as Corona pfeifferi (Hidalgo, 1869) (source of synonymy)
Corona regalis (Hupé, 1857) (additional source)
Cyclonenia cyclostoma (L. Pfeiffer, 1850) (additional source)
Cyclostoma (Bourciera) fraseri L. Pfeiffer, 1859 accepted as Bourciera fraseri (L. Pfeiffer, 1859) (basis of record)
Cyclostoma aspratile Morelet, 1873 accepted as Subannularia lachneri (L. Pffeifer, 1862) (basis of record)
Cyclostoma bifasciatum G. B. Sowerby I, 1850 (additional source)
Cylindrella aequatoria Morelet, 1873 accepted as Arangia sowerbyana (L. Pfeiffer, 1847) (additional source)