Opalia crassilabrum (G.B. II Sowerby, 1844)
Opalia crenata (C. Linnaeus, 1758)
Opalia crenatoides P.P. Carpenter, 1864
Opalia crystallina (P.P. Carpenter, 1864)
Opalia diadema (G.B. I Sowerby, 1832)
Opalia dushaneae E.F. Garcia, 2004
Opalia eolis W.J. Clench & H. Turner,1950
Opalia excentrica (FOSSIL) (M.E.A. de Boury, 1890 †)
Opalia exopleura (W.H. Dall, 1917)
Opalia felderi E.F. Garcia, 2004
Opalia flemingi (FOSSIL) A.G. Beu, 2011 †
Opalia fortunata P. Bouchet & A. Warén,1986
Opalia francisci (FOSSIL) (Caillat, 1835 †)
Opalia funiculata (P.P. Carpenter, 1857)
Opalia gaini (M.E.A. de Bouryin É. Lamy, 1923)
Opalia garciai R.N. Kilburn, 1994
Opalia gereti (M.E.A. de Boury, 1913)
Opalia gouldi (FOSSIL) G.P. Deshayes, 1861 †
Opalia granosa (J.R.C. Quoy& J.P. Gaimard, 1834)
Opalia granulosa M.E.A. de Boury, 1909
Opalia hellenica (E. Forbes, 1844)
Opalia hidryma (J.C. Melvill, 1899)
Opalia hotessieriana (A.V.M.D. D'Orbigny,1842)
Opalia infrequens (C.B. Adams, 1852)
Opalia komitica (FOSSIL) (C.R. Laws, 1944 †)
Opalia koskinum (C. Hedley, 1909)
Opalia lamarckii (FOSSIL) G.P. Deshayes, 1861 †
Opalia leeana (A.E. Verrill, 1882)
Opalia levesquei (FOSSIL) M.E.A. de Boury, 1887 †
Opalia levis T. Nakayama, 2010
Opalia longissima E.F. Garcia, 2004
Opalia mackayi (FOSSIL) P.A. Maxwell, 1992 †
Opalia mammosa (J.C. Melvill & R. Standen,1903)
Opalia martis (K.H.J. Thiele, 1925)
Opalia matajiroi (J.T. Kuroda, 1954)