• Codakia (Ctena) Mörch, 1861 accepted as Ctena Mörch, 1861
• Codakia (Ctena) decorata (S. V. Wood, 1851) † accepted as Ctena decorata (S. V. Wood, 1851) †
• Ctena Mörch, 1861
• Ctena (Ctena) Mörch, 1861 accepted as Ctena Mörch, 1861
• Ctena (Ctena) sulphurea Kilburn, 1974 accepted as Epicodakia sulphurea (Kilburn, 1974)
• Ctena bella (Conrad, 1837)
• Ctena chiquita (Dall, 1901) accepted as Callucina chiquita (Dall, 1901)
• Ctena clarionensis Hertlein & A. M. Strong, 1946 accepted as Epicodakia clarionensis (Hertlein & A. M. Strong, 1946)
• Ctena clippertonensis Bartsch & Rehder, 1939 accepted as Epicodakia clippertonensis (Bartsch & Rehder, 1939)
• Ctena decorata (S. V. Wood, 1851) †
• Ctena decussata (O. G. Costa, 1829)
• Ctena delicatula (Pilsbry, 1904)
• Ctena divergens (R. A. Philippi, 1850)
• Ctena eburnea (Gmelin, 1791)
• Ctena exigua (Eichwald, 1830) †
• Ctena galapagana (Dall, 1901)
• Ctena gunnamatta (Iredale, 1930) accepted as Ctena bella (Conrad, 1837)
• Ctena imbricatula (C. B. Adams, 1845)
• Ctena mexicana (Dall, 1901)
• Ctena orbiculata (Montagu, 1808)
• Ctena pectinata (Linnaeus, 1758) accepted as Ctena eburnea (Gmelin, 1791)
• Ctena pectinella (C. B. Adams, 1852) accepted as Parvilucina pectinella (C. B. Adams, 1852)
• Ctena reevei (Deshayes, 1863)
• Ctena squamosa (Lamarck, 1806) † accepted as Epicodakia squamosa (Lamarck, 1806) †
• Ctena sulphurea Kilburn, 1974 accepted as Epicodakia sulphurea (Kilburn, 1974)
• Ctena tatei (Angas, 1879)
• Ctena transversa Dall, Bartsch & Rehder, 1938 accepted as Epicodakia transversa (Dall, Bartsch & Rehder, 1938)
• Ctena valida (E. A. Smith, 1904) accepted as Cardiolucina valida (E. A. Smith, 1904)
• Ctenacanthus Garjajeff, 1901 accepted as Boeckaxelia Schellenberg, 1940
• Ctenacanthus radoszkowskii (Dybowsky, 1874) accepted as Coniurus radoschkowskii (Dybowsky, 1874)
• Ctenacanthus roseus Garjajeff, 1901 accepted as Garjajewia rosea (Garjajeff, 1901)
• Ctenacanthus ruber Garjajeff, 1901 accepted as Boeckaxelia rubra (Garjajeff, 1901)
• Ctenacanthus zienkowiczii (Dybowsky, 1874) accepted as Sentogammarus zienkowiczii (Dybowsky, 1874)
• Ctenacaridae Grandjean, 1954
• Ctenacaroidea Grandjean, 1954
• Ctenacarus Grandjean, 1939
• Ctenacarus araneolus (Grandjean, 1932)
• Ctenacis Compagno, 1973
• Ctenacis fehlmanni (Springer, 1968)
• Ctenactis Verrill, 1864
• Ctenactis albitentaculata Hoeksema, 1989
• Ctenactis crassa (Dana, 1846)
• Ctenactis echinata (Pallas, 1766)
• Ctenactis gigantea (Dana, 1846) accepted as Ctenactis echinata (Pallas, 1766)
• Ctenactis triangularis Mondal & Raghunathan, 2013 (uncertain > taxon inquirendum)
• Ctenalosia Cooper & Stehli, 1955 †
• Ctenalosia fixata Cooper & Stehli, 1955 †
• Ctenalosia primitiva Cooper & Grant, 1975 †
• Ctenalosia rotunda Cooper & Grant, 1975 †
• Ctenalosia transversa Cooper & Grant, 1975 †
• Ctenalosiidae Muir-Wood & Cooper, 1960 †
• Ctenalosiinae Muir-Wood & Cooper, 1960 †
• Ctenamphiura Verrill, 1899 accepted as Amphiura Forbes, 1843
• Ctenamphiura dawbini Fell, 1952 accepted as Amphiura (Amphiura) dawbini (Fell, 1952)
• Ctenamphiura maxima (Lyman, 1879) accepted as Amphiura (Amphiura) maxima Lyman, 1879
• Ctenamphiura sinensis A.H. Clark, 1917 accepted as Paracrocnida sinensis (A.H. Clark, 1917)
• Ctenamusium Iredale, 1929 accepted as Parvamussium Sacco, 1897
• Ctenamusium (Bathyamussium) Habe, 1951 accepted as Propeamussium De Gregorio, 1884
• Ctenamusium (Micramussium) Oyama, 1951 accepted as Propeamussium De Gregorio, 1884
• Ctenamusium (Micramussium) siratama Oyama, 1951 accepted as Propeamussium siratama (Oyama, 1951)
• Ctenamusium clancularium (Yokoyama, 1929) † accepted as Propeamussium clancularium (Yokoyama, 1926) †
• Ctenamusium kusiroense (Takaeda, 1953) † accepted as Parvamussium kusiroense (Takaeda, 1953) †
• Ctenamusium salacon Iredale, 1929 accepted as Parvamussium thetidis (Hedley, 1902)
• Ctenamusium sinense Z.-R. Wang, 1980 accepted as Parvamussium sinense (Z.-R. Wang, 1980)
• Ctenamusium vafer Marwick, 1931 † accepted as Parvamussium vafer (Marwick, 1931) †
• Ctenamussium [sic] accepted as Ctenamusium Iredale, 1929 accepted as Parvamussium Sacco, 1897
• Ctenamussium (Bathyamussium) Habe, 1951 accepted as Propeamussium De Gregorio, 1884
• Ctenamussium (Bathyamussium) amakusaensis Ômori, 1955 † accepted as Propeamussium amakusaensis (Ômori, 1955) †
• Ctenamussium cancellata Ômori, 1955 † accepted as Parvamussium cancellata (Ômori, 1955) †
• Ctenamussium inouei Ômori, 1955 † accepted as Parvamussium inouei (Ômori, 1955) †
• Ctenamussium paradoxum P. A. Maxwell, 1969 † accepted as Parvamussium paradoxum (P. A. Maxwell, 1969) †
• Ctenamussium vafer Marwick, 1931 † accepted as Parvamussium vafer (Marwick, 1931) †
• Ctenantedon Meyer, 1972
• Ctenantedon kinziei Meyer, 1972
• Ctenapseudes Bamber, Ariyananda & Silva, 1997
• Ctenapseudes chilkensis (Chilton, 1924)
• Ctenapseudes extravaganza Bamber, Ariyananda & Silva, 1997
• Ctenapseudes indiana Pandiyarajan & Biju, 2017
• Ctenapseudes sapensis (Chilton, 1926)
• Ctenaria Haeckel, 1879 (uncertain > taxon inquirendum)
• Ctenaria ctenophora Haeckel, 1879 (uncertain > taxon inquirendum)
• Ctenascarophis Mamaev, 1968
• Ctenascarophis gastricus Mamaev, 1968
• Ctenascarophis lesteri Crites, Overstreet & Maung, 1993
• Ctenaster L. Agassiz, 1836 (unaccepted > nomen nudum)
• Ctenaster Perrier, 1881 accepted as Laetmaster Fisher, 1908
• Ctenaster spectabilis Perrier, 1881 accepted as Laetmaster spectabilis (Perrier, 1881)
• Ctenasterias Verrill, 1914 accepted as Leptasterias Verrill, 1866
• Ctenasterias cribraria (Stimpson, 1861) accepted as Leptasterias (Endogenasterias) groenlandica (Steenstrup in Lutken, 1857) represented as Leptasterias groenlandica (Steenstrup in Lutken, 1857)
• Ctenasterias georgiana (Studer, 1885) accepted as Neosmilaster georgianus (Studer, 1885)