Opalia H. & A. Adams, 1853

Opalia abbotti Clench & Turner, 1952

Opalia acus

Opalia aglaia (Bartsch, 1915)

Opalia ahiparana (Powell, 1930)

Opalia alba (de Boury, 1911)

Opalia andrewsii (A. E. Verrill, 1882)

Opalia antarctica (E. A. Smith, 1907)

Opalia apostolorum (Iredale, 1936)

Opalia attenuata (Pease, 1860)

Opalia aurifila (Dall, 1889)

Opalia australis (Lamarck, 1822)

Opalia ballinensis (E. A. Smith, 1891)

Opalia bardeyi (Jousseaume, 1912)

Opalia bicarinata (G. B. Sowerby II, 1844)

Opalia borealis Keep, 1881

Opalia bullata (Carpenter, 1864)

Opalia burchorum DuShane, 1988

Opalia burryi Clench & Turner, 1950

Opalia chacei Strong, 1937

Opalia colimana Hertlein & Strong, 1951

Opalia corolla (Melvill & Standen, 1903)

Opalia coronata (Philippi, 1844)

Opalia crassilabra (Sowerby, 1844)

Opalia crassilabrum (Sowerby, 1844)

Opalia crenata (Linnaeus, 1758)

Opalia crenatoides (Carpenter, 1864)

Opalia crosseana (Tapparone-canefri, 1876)

Opalia crystallina (Carpenter, 1864)

Opalia diadema (G. B. Sowerby, 1832)

Opalia dushaneae Garcia, 2004

Opalia eolis Clench & Turner, 1950

Opalia espirita (Baker, Hanna, and Strong, 1930)

Opalia evicta De Boury, 1919

Opalia exopleura (Dall, 1917)

Opalia felderi Garcia, 2004

Opalia (Opalia) fistulosa

Opalia fortunata Bouchet & Warén, 1986

Opalia funiculata (Carpenter, 1857)

Opalia gaini Lamy, 1922

Opalia garciai Kilburn, 1994

Opalia gereti (de Boury, 1913)

Opalia granosa (Quoy & Gaimard, 1834)

Opalia granulata Reeve, 1873

Opalia granulosa de Boury, 1909

Opalia gruveli (de Boury)

Opalia hellenica (Forbes, 1844)

Opalia (Dentiscala) hertleini

Opalia hidryma (Melvill, 1899)

Opalia hotessieriana (d'Orbigny, 1842)

Opalia infrequens (C. B. Adams, 1852)

Opalia japonica (Okutani, 1964)

Opalia koskinum (Hedley, 1909)

Opalia leeana (A. E. Verrill, 1883)

Opalia levis Nakayama, 2010

Opalia longissima Garcia, 2004

Opalia mammosa (Melvill & Standen, 1903)

Opalia martis (Thiele, 1925)

Opalia matajiroi (Kuroda, 1954)

Opalia mauritanica Talavera, 1975

Opalia megalodon Garcia, 2004

Opalia methoria Kilburn, 1985

Opalia mexicana Dall, 1908

Opalia minervae (Thiele, 1925)

Opalia monovaricosa (Kuroda & Habe, 1961)

Opalia montereyensis (Dall, 1907)

Opalia morchiana (Dall, 1889)

Opalia mormulaeformis (Masahito, Kuroda & Habe, 1971)

Opalia neocaledonica Garcia, 2004

Opalia (Nodiscala) obtusicostata

Opalia pacoi Engl, 2002

Opalia paucisculpta Bozzetti, 2007

Opalia paulula DuShane, 1974

Opalia pseudoescalaris (Melvill & Standen, 1901)

Opalia pumilio (Morch, 1874)

Opalia punctata (Thiele, 1925)

Opalia pupipunctata (de Boury, 1911)

Opalia retiporosa (Carpenter, 1864)

Opalia sanjuanensis (Lowe, 1932)

Opalia soror (Odhner, 1919)

Opalia spongiosa (Carpenter, 1866)

Opalia subcrassa (Cotton & Godfrey, 1938)

Opalia sumatrensis (Thiele, 1925)

Opalia terebralioides Kilburn, 1975

Opalia texta (E. A. Smith, 1903)

Opalia thorsenae Garcia, 2004

Opalia tortilis (Watson, 1883)

Opalia turnerae Garcia, 2004

Opalia velumnuptialis Garcia, 2004

Opalia (Pliciscala) wadei

Opalia wareni Garcia, 2004

Opalia watsoni (De Boury, 1911)

Opalia wroblewskii (Morch, 1876)

Opalia wroblewskyi (Mörch, 1875)

Opalia zelandica (Finlay, 1930)

Pliciscala (Cylindriscala) albitesta

Scala (Opalia) calvertensis

Scala (Opalia) prunicola