• Opalia H. Adams & A. Adams, 1853
• Opalia (Claviscala) de Boury, 1909 accepted as Claviscala de Boury, 1909
• Opalia (Claviscala) terebralioides Kilburn, 1975 accepted as Claviscala kuroharai Kuroda, 1961
• Opalia (Crassiscala) De Boury, 1887 † represented as Opalia H. Adams & A. Adams, 1853
• Opalia (Crassiscala) aemula (Deshayes, 1861) † accepted as Opalia aemula (Deshayes, 1861) †
• Opalia (Crassiscala) bigoti (de Boury, 1910) † accepted as Opalia bigoti (de Boury, 1910) †
• Opalia (Crassiscala) chevallieri (Cossmann, 1888) † accepted as Opalia chevallieri (Cossmann, 1888) †
• Opalia (Crassiscala) francisci (Caillat, 1835) † accepted as Opalia francisci (Caillat, 1835) †
• Opalia (Crassiscala) variculosa (Deshayes, 1861) † accepted as Opalia variculosa (Deshayes, 1861) †
• Opalia (Dentiscala) de Boury, 1886 accepted as Dentiscala de Boury, 1886
• Opalia (Dentiscala) bervillensis (de Boury, 1913) † accepted as Opalia bervillensis (de Boury, 1913) †
• Opalia (Dentiscala) fratercula Glibert, 1949 † accepted as Dentiscala fratercula (Glibert, 1949) †
• Opalia (Dentiscala) mazatlanica Dall, 1908 accepted as Opalia infrequens (C. B. Adams, 1852)
• Opalia (Dentiscala) mexicana Dall, 1908 accepted as Opalia mexicana Dall, 1908
• Opalia (Dentiscala) plicata (Lamarck, 1804) † accepted as Opalia plicata (Lamarck, 1804) †
• Opalia (Funiscala) De Boury, 1891 † represented as Opalia H. Adams & A. Adams, 1853
• Opalia (Funiscala) nincki (de Boury, 1912) † accepted as Opalia nincki (de Boury, 1912) †
• Opalia (Nodiscala) de Boury, 1890 represented as Opalia H. Adams & A. Adams, 1853
• Opalia (Nodiscala) ahiparana (A. W. B. Powell, 1930) represented as Opalia ahiparana (A. W. B. Powell, 1930)
• Opalia (Nodiscala) bicarinata (G. B. Sowerby II, 1844) represented as Opalia bicarinata (G. B. Sowerby II, 1844)
• Opalia (Nodiscala) crassilabrum (G. B. Sowerby II, 1844) represented as Opalia crassilabrum (G. B. Sowerby II, 1844)
• Opalia (Nodiscala) crystallina (P. P. Carpenter, 1864) represented as Opalia crystallina (P. P. Carpenter, 1864)
• Opalia (Nodiscala) gruveli Weil, L. G. Brown & Neville, 1999 accepted as Opalia gruveli Weil, L. G. Brown & Neville, 1999
• Opalia (Nodiscala) komitica (Laws, 1944) † represented as Opalia komitica (Laws, 1944) †
• Opalia (Nodiscala) nympha (F. W. Hutton, 1885) † represented as Opalia nympha (F. W. Hutton, 1885) †
• Opalia (Nodiscala) obtusicostata (S. V. Wood, 1848) † represented as Opalia obtusicostata (S. V. Wood, 1848) †
• Opalia (Nodiscala) peyrerensis Lozouet, 1999 † represented as Opalia peyrerensis Lozouet, 1999 †
• Opalia (Nodiscala) tortipunctata Weil, L. G. Brown & Neville, 1999 represented as Opalia tortipunctata Weil, L. G. Brown & Neville, 1999
• Opalia (Opalia) H. Adams & A. Adams, 1853 represented as Opalia H. Adams & A. Adams, 1853
• Opalia (Opalia) mackayi P. A. Maxwell, 1992 † represented as Opalia mackayi P. A. Maxwell, 1992 †
• Opalia (Opalia) tenuispiralis (P. Marshall, 1919) † represented as Opalia tenuispiralis (P. Marshall, 1919) †
• Opalia (Pliciscala) de Boury, 1887 represented as Opalia H. Adams & A. Adams, 1853
• Opalia (Pliciscala) aglaia (Bartsch, 1915) represented as Opalia aglaia (Bartsch, 1915)
• Opalia (Pliciscala) flemingi Beu, 2011 † represented as Opalia flemingi Beu, 2011 †
• Opalia (Pliciscala) gouldi (Deshayes, 1861) † accepted as Opalia gouldi (Deshayes, 1861) †
• Opalia (Pliciscala) lamarckii (Deshayes, 1861) † accepted as Opalia lamarckii (Deshayes, 1861) †
• Opalia (Pliciscala) methoria Kilburn, 1985 represented as Opalia methoria Kilburn, 1985
• Opalia (Pliciscala) mormulaeformis (Masahito, Kuroda & T. Habe, 1971) represented as Opalia mormulaeformis (Masahito, Kuroda & T. Habe, 1971)
• Opalia (Pliciscala) thomseni Schnetler, 2001 † represented as Opalia thomseni Schnetler, 2001 †
• Opalia (Pliciscala) waikakahiensis (P. A. Maxwell, 1992) † represented as Opalia waikakahiensis (P. A. Maxwell, 1992) †
• Opalia (Rugatiscala) de Boury, 1913 † represented as Opalia H. Adams & A. Adams, 1853
• Opalia (Rugatiscala) levesquei (de Boury, 1887) † accepted as Opalia levesquei (de Boury, 1887) †
• Opalia abbotti Clench & R. D. Turner, 1952
• Opalia aemula (Deshayes, 1861) †
• Opalia aglaia (Bartsch, 1915)
• Opalia ahiparana (A. W. B. Powell, 1930)
• Opalia alba (de Boury, 1911)
• Opalia andrewsii (A. E. Verrill, 1882) accepted as Cylindriscala andrewsii (A. E. Verrill, 1882)
• Opalia antarctica (E. A. Smith, 1907) accepted as Acirsa antarctica (E. A. Smith, 1907)
• Opalia apostolorum (Iredale, 1936)
• Opalia attenuata (Pease, 1860) accepted as Opalia bicarinata (G. B. Sowerby II, 1844)
• Opalia aurifila (Dall, 1889)
• Opalia australis (Lamarck, 1822)
• Opalia bairdii (E. A. Smith, 1872)
• Opalia ballinensis (E. A. Smith, 1891)
• Opalia barbadensis (de Boury, 1913) accepted as Opalia pumilio var. moerchiana (Dall, 1889) accepted as Opalia moerchiana (Dall, 1889)
• Opalia bardeyi (Jousseaume, 1912)
• Opalia bardeyi var. minor (Jousseaume, 1912) accepted as Opalia bardeyi (Jousseaume, 1912)
• Opalia basicarinata Lozouet, 1999 †
• Opalia bervillensis (de Boury, 1913) †
• Opalia bicarinata (G. B. Sowerby II, 1844)
• Opalia bigoti (de Boury, 1910) †
• Opalia billaudeli (Mayer, 1864) †
• Opalia borealis (A. Gould, 1852) accepted as Opalia wroblewskyi (Mörch, 1875)
• Opalia borealis chacei A. M. Strong, 1937 accepted as Opalia wroblewskyi (Mörch, 1875)
• Opalia bullata P. P. Carpenter, 1864 accepted as Opalia infrequens (C. B. Adams, 1852)
• Opalia burchorum DuShane, 1988
• Opalia burryi Clench & R. D. Turner, 1950
• Opalia calyx T. Nakayama, 2012
• Opalia candida T. Cossignani, 2020
• Opalia cerigottana (Sturany, 1896) accepted as Punctiscala cerigottana (Sturany, 1896)
• Opalia cerigottana nicolayi F. Nordsieck, 1974 accepted as Opalia abbotti Clench & R. D. Turner, 1952
• Opalia chacei A. M. Strong, 1937 accepted as Opalia wroblewskyi (Mörch, 1875)
• Opalia chevallieri (Cossmann, 1888) †
• Opalia colimana (Hertlein & A. M. Strong, 1951)
• Opalia consors (Crosse & P. Fischer, 1864) accepted as Gyroscala lamellosa (Lamarck, 1822) accepted as Gyroscala commutata (Monterosato, 1877)
• Opalia corolla (Melvill & Standen, 1903)
• Opalia coronata (R. A. Philippi & Scacchi, 1840)
• Opalia corsicana F. Nordsieck, 1974 accepted as Opalia coronata (R. A. Philippi & Scacchi, 1840)
• Opalia crassilabrum (G. B. Sowerby II, 1844)
• Opalia crenata (Linnaeus, 1758)
• Opalia crenatoides P. P. Carpenter, 1864
• Opalia crenulata (Kiener, 1838) accepted as Opalia crenata (Linnaeus, 1758)
• Opalia crystallina (P. P. Carpenter, 1864)
• Opalia diadema (G. B. Sowerby I, 1832)
• Opalia dromio Dall, 1927 accepted as Opaliopsis opalina (Dall, 1927)
• Opalia dushaneae E. F. García, 2004
• Opalia eolis Clench & R. D. Turner, 1950
• Opalia espirita (F. Baker, G. D. Hanna & A. M. Strong, 1930) accepted as Opalia crystallina (P. P. Carpenter, 1864)
• Opalia evicta (de Boury, 1919) accepted as Opalia montereyensis (Dall, 1907)
• Opalia exopleura (Dall, 1917)
• Opalia exquisita A. Adams, 1864 accepted as Epitonium exquisitum (A. Adams, 1864)
• Opalia felderi E. F. García, 2004
• Opalia flemingi Beu, 2011 †
• Opalia fortunata Bouchet & Warén, 1986
• Opalia francisci (Caillat, 1835) †
• Opalia fregata (Iredale, 1936) accepted as Cirsotrema fregata (Iredale, 1936) accepted as Rectacirsa fregata Iredale, 1936
• Opalia funiculata (P. P. Carpenter, 1857)
• Opalia fusoides (Jousseaume, 1912) accepted as Opalia bicarinata (G. B. Sowerby II, 1844)
• Opalia fusticulus Gaglini, 1992