Các loài được ghi nhận theo World Register of Marine Species (WoRMS):[1]

• Opalia andrewsii (A. E. Verrill, 1882): synonym of Cylindriscala andrewsii (A. E. Verrill, 1882)
• Opalia antarctica (E. A. Smith, 1907): synonym of Acirsa antarctica (E. A. Smith, 1907)
• Opalia barbadensis (de Boury, 1913): synonym of Opalia pumilio var. morchiana (Dall, 1889): synonym of Opalia morchiana (Dall, 1889)
• Opalia borealis Keep, 1881: synonym of Opalia wroblewskyi (Mörch, 1875)
• Opalia bullata Carpenter, 1864: synonym of Opalia infrequens (C. B. Adams, 1852)
• Opalia cerigottana Sturany, 1896: synonym of Punctiscala cerigottana (Sturany, 1896)
• Opalia chacei Strong, 1937: synonym of Opalia wroblewskyi (Mörch, 1875)
• Opalia consors (Crosse & P. Fischer, 1864): synonym of Gyroscala lamellosa (Lamarck, 1822)
• Opalia coronata (Scacchi, 1844): synonym of Opalia hellenica (Forbes, 1844)
• Opalia corsicana Nordsieck, 1974: synonym of Acirsa subdecussata (Cantraine, 1835)
• Opalia crenulata (Kiener, 1839): synonym of Opalia crenata (Linnaeus, 1758)
• Opalia dromio Dall, 1927: synonym of Opaliopsis opalina (Dall, 1927)
• Opalia espirita (Baker, Hanna & Strong, 1930): synonym of Opalia crystallina (Carpenter, 1864)
• Opalia evicta (de Boury, 1919): synonym of Opalia montereyensis (Dall, 1907)
• Opalia fregata (Iredale, 1936): synonym of Cirsotrema fregata (Iredale, 1936)
• Opalia fusoides (Jousseaume, 1912): synonym of Opalia bicarinata (G. B. Sowerby II, 1844)
• Opalia fusticulus Gaglini, 1992: synonym of Opalia abbotti Clench & Turner, 1952
• Opalia gracilis (Masahito, Kuroda & Habe, 1971): synonym of Opalia bicarinata (G. B. Sowerby II, 1844)
• Opalia grossicostata (Nyst, 1871): synonym of Opalia hotessieriana (d'Orbigny, 1842)
• Opalia humerosa (Schepman, 1909): synonym of Cylindriscala humerosa (Schepman, 1909)
• Opalia insculpta Carpenter, 1865: synonym of Opalia crenatoides Carpenter, 1864
• Opalia japonica (Okutani, 1964): synonym of Papuliscala japonica (Okutani, 1964)
• Opalia linteata (Schwengel, 1943): synonym of Opalia pumilio (Mörch, 1875)
• Opalia magellanica (Philippi, 1845): synonym of Epitonium magellanicum (Philippi, 1845)
• Opalia maxwelli (Finlay, 1930): synonym of Funiscala maxwelli Finlay, 1930
• Opalia mazatlanica Dall, 1908: synonym of Opalia infrequens (C. B. Adams, 1852)
• Opalia nicolayi Nordsieck, 1974: synonym of Opalia abbotti Clench & Turner, 1952
• Opalia nodosocarinata (Dall, 1889): synonym of Opalia pumilio (Mörch, 1875)
• † Opalia plicosa (Philippi, 1844): synonym of † Punctiscala plicosa (Philippi, 1844)
• Opalia pluricostata Dall, 1917: synonym of Opalia montereyensis (Dall, 1907)
• Opalia retiporosa (Carpenter, 1866): synonym of Opalia spongiosa Carpenter, 1864
• Opalia revizee Lima, Christoffersen, Barros & Folly, 2012: synonym of Opalia revizee Lima & Christoffersen, 2014
• Opalia terebralioides Kilburn, 1975: synonym of Claviscala terebralioides (Kilburn, 1975)
• Opalia tortilis (Watson, 1883): synonym of Cylindriscala tortilis (Watson, 1883)
• Opalia torulosa (Brocchi, 1814): synonym of Claviscala richardi (Dautzenberg & de Boury, 1897)
• Opalia tremperi Bartsch, 1927: synonym of Opalia infrequens (C. B. Adams, 1852)
• Opalia valida (Verco, 1906): synonym of Cirsotrema validum (Verco, 1906)