Abietinaria Kirchenpauer, 1884 (additional source)
Acanthodasys Remane, 1927 (additional source)
Acanthodasys aculeatus Remane, 1927 (additional source)
Acanthodasys arcassonensis Kisielewski, 1987 (additional source)
Actinauge Verrill, 1883 (additional source)
Actinauge richardi (Marion, 1906) (additional source)
Aglantha digitale (O. F. Müller, 1776) (additional source)
Antipathes Pallas, 1766 (additional source)
Antipathidae Ehrenberg, 1834 (additional source)
Aplidium Savigny, 1816 (additional source)
Aplidium densum (Giard, 1872) (additional source)
Archidistoma Garstang, 1891 (additional source)
Archidistoma aggregatum Garstang, 1891 (additional source)
Ascidia conchilega Müller, 1776 (additional source)
Ascidia mentula Müller, 1776 (additional source)
Aspidiophorus Voigt, 1903 (additional source)
Aspidiophorus bisquamosus Mock, 1979 (additional source)
Aspidiophorus marinus Remane, 1926 (additional source)
Aspidiophorus mediterraneus Remane, 1927 (additional source)
Aspidiophorus ornatus Mock, 1979 (additional source)
Aspidiophorus paramediterraneus Hummon, 1974 (basis of record)
Atollidae Hickson, 1906 (additional source)
Aurelia Lamarck, 1816 (additional source)
Aurelia aurita (Linnaeus, 1758) (additional source)
Bursovaginoidea (basis of record)
Calycella Hincks, 1864 in Allman, 1864 (additional source)
Calycella gracilis Hartlaub, 1897 (additional source)
Calycella hispida (Nutting, 1896) (basis of record)
Campanulina Van Beneden, 1847 (basis of record)
Campanulina panicula G.O. Sars, 1874 accepted as Earleria panicula (G.O. Sars, 1874) (basis of record)
Campanulina pumila (Clark, 1875) (basis of record)
Campanulinidae Hincks, 1868 (basis of record)
Campyloderes Zelinka, 1907 (additional source)
Campyloderes macquariae Johnston, 1938 (additional source)
Candelabridae Stechow, 1921 (additional source)
Candelabrum de Blainville, 1830 (additional source)
Centroderes Zelinka, 1907 (additional source)
Centroderes spinosus (Reinhard, 1881) (additional source)
Centroderidae Zelinka, 1896 (additional source)
Cephalodasys Remane, 1926 (additional source)
Cephalodasys cambriensis (Boaden, 1963) (basis of record)
Cephalodasys maximus Remane, 1926 (additional source)
Cephalodasys turbanelloides (Boaden, 1960) (basis of record)
Chaetonotidae Gosse, 1864 sensu Leasi & Todaro, 2008 (additional source)
Chaetonotoidea accepted as Chaetonotida (additional source)
Chaetonotus Ehrenberg, 1830 (additional source)
Chaetonotus (Chaetonotus) condensus Mock, 1979 (additional source)
Chaetonotus (Chaetonotus) larus (Müller, 1773) (basis of record)
Chaetonotus (Chaetonotus) linguaeformis Voigt, 1902 (basis of record)
Chaetonotus (Chaetonotus) tempestivus Mock, 1979 (additional source)
Chaetonotus (Hystricochaetonotus) lacunosus Mock, 1979 (additional source)
Chaetonotus (Marinochaetus) oceanides d'Hondt, 1971 (additional source)
Chaetonotus (Schizochaetonotus) atrox Wilke, 1954 (additional source)
Chaetonotus (Schizochaetonotus) dispar Wilke, 1954 (additional source)
Chaetonotus (Schizochaetonotus) inaequidentatus Kisielewski, 1988 (additional source)
Chaetonotus (Schizochaetonotus) neptuni Wilke, 1954 (additional source)
Chaetonotus balticus Remane, 1926 (additional source)
Chaetonotus marinus Giard, 1904 (basis of record)
Chaetonotus maximus Ehrenberg, 1831 represented as Chaetonotus (Chaetonotus) maximus Ehrenberg, 1838 (additional source)
Chaetonotus parthenopeius Wilke, 1954 (additional source)
Chaetonotus somniculosus Mock, 1979 accepted as Halichaetonotus somniculosus (Mock, 1979) (additional source)
Chaetonotus variosquamatus Mock, 1979 (additional source)
Chrysaora Péron & Lesueur, 1810 (additional source)
Chrysaora hysoscella (Linnaeus, 1767) (additional source)
Ciliocincta Kozloff, 1965 (additional source)
Ciliocincta julini (Caullery & Mesnil, 1899) (additional source)
Cnidaria (additional source)
Condyloderes Higgins, 1969 (additional source)
Condyloderes multispinosus (McIntyre, 1962) Higgins, 1969 (additional source)
Conocyema Van Beneden, 1882 (additional source)
Conocyema polymorpha Van Beneden, 1882 (additional source)
Conocyemidae (additional source)
Crasiella Clausen, 1968 (additional source)
Crasiella diplura Clausen, 1968 (additional source)
Crasiella oceanica d'Hondt, 1974 (additional source)
Cyanea Péron & Lesueur, 1810 (additional source)
Cyanea capillata (Linnaeus, 1758) (additional source)
Cyanea lamarckii Péron & Lesueur, 1810 (additional source)
Cyaneidae L. Agassiz, 1862 (additional source)
Cyclorhagida (additional source)
Dactylopodola Strand, 1929 (additional source)
Dactylopodola baltica (Remane, 1926) (additional source)
Dactylopodola cornuta (Swedmark, 1956) (additional source)
Dactylopodola roscovita (Swedmark, 1967) (additional source)
Dactylopodola typhle (Remane, 1927) (additional source)
Dactylopodolidae Strand, 1929 (additional source)
Dendrodasys Wilke, 1954 (additional source)
Dendrodasys gracilis Wilke, 1954 (additional source)
Dendrodoa MacLeay, 1824 (additional source)
Desmodasys Clausen, 1965 (additional source)
Desmodasys phocoides Clausen, 1965 (additional source)
Dicyema von Kölliker, 1849 (additional source)
Dicyema paradoxum von Kölliker, 1849 (additional source)
Dicyema schulzianum (Van Beneden, 1876) (additional source)
Dicyema truncatum Whitman, 1883 accepted as Pseudicyema truncatum (Whitman, 1883) (basis of record)
Dicyema typus Van Beneden, 1876 (additional source)
Dicyemennea Whitman, 1883 (additional source)
Dicyemennea eledones (Wagener, 1857) (additional source)
Dicyemidae van Beneden, 1882 (additional source)
Didemnum Savigny, 1816 (additional source)