Adeonidae Busk, 1884 (basis of record)
Aetea Lamouroux, 1812 (basis of record)
Aetea anguina (Linnaeus, 1758) (basis of record)
Aetea sica (Couch, 1844) (basis of record)
Aetea truncata (Landsborough, 1852) (basis of record)
Aeteidae Smitt, 1868 (basis of record)
Alcyonidiidae Johnston, 1837 (basis of record)
Alcyonidium Lamouroux, 1813 (basis of record)
Alcyonidium albidum Alder, 1857 (basis of record)
Alcyonidium cellarioides Calvet, 1900 (basis of record)
Alcyonidium diaphanum (Hudson, 1778) (basis of record)
Alcyonidium gelatinosum (Linnaeus, 1761) (basis of record)
Alcyonidium hirsutum (Fleming, 1828) (basis of record)
Alcyonidium mamillatum Alder, 1857 (basis of record)
Alcyonidium mytili Dalyell, 1848 accepted as Alcyonidioides mytili (Dalyell, 1848) (basis of record)
Alcyonidium parasiticum (Fleming, 1828) (basis of record)
Alderina Norman, 1903 (basis of record)
Alderina imbellis (Hincks, 1860) (basis of record)
Amathia Lamouroux, 1812 (basis of record)
Amathia guernseii Chimonides, 1987 (basis of record)
Amathia intermedis Chimonides, 1987 (basis of record)
Amathia lendigera (Linnaeus, 1758) (basis of record)
Amathia pruvoti Calvet, 1911 (basis of record)
Ammatophora Norman, 1903 (basis of record)
Ammatophora nodulosa (Hincks, 1877) (basis of record)
Amphiblestrum Gray, 1848 (basis of record)
Amphiblestrum auritum (Hincks, 1877) (basis of record)
Amphiblestrum flemingii (Busk, 1854) (basis of record)
Amphiblestrum solidum (Packard, 1863) (basis of record)
Anarthropora Smitt, 1868 (basis of record)
Anarthropora monodon (Busk, 1860) (basis of record)
Anguinella van Beneden, 1845 (basis of record)
Anguinella palmata Van Beneden, 1845 (basis of record)
Annectocyma Hayward & Ryland, 1985 (basis of record)
Annectocyma major (Johnston, 1847) (basis of record)
Annectocymidae Hayward & Ryland, 1985 (basis of record)
Arachnidiidae Hincks, 1880 (basis of record)
Arachnidium Hincks, 1859 (basis of record)
Arachnidium clavatum Hincks, 1877 (basis of record)
Arachnidium fibrosum Hincks, 1880 (basis of record)
Arachnidium hippothooides Hincks, 1859 (basis of record)
Arctonula Gordon & Grischenko, 1994 (basis of record)
Arctonula arctica (M. Sars, 1851) (basis of record)
Arthropoma Levinsen, 1909 (basis of record)
Arthropoma cecilii (Audouin, 1826) (basis of record)
Aspidelectra Levinsen, 1909 (basis of record)
Aspidelectra melolontha (Landsborough, 1852) (basis of record)
Bantariella Jebram, 1973 (basis of record)
Bantariella verticillata (Heller, 1867) (basis of record)
Beania Johnston, 1840 (basis of record)
Beania magellanica (Busk, 1852) (basis of record)
Beania mirabilis Johnston, 1840 (basis of record)
Beaniidae Canu & Bassler, 1927 (basis of record)
Bicellariella Levinsen, 1909 (basis of record)
Bicellariella ciliata (Linnaeus, 1758) (basis of record)
Bicellarina Levinsen, 1909 (basis of record)
Bicellarina alderi (Busk, 1859) (basis of record)
Bicrisia d'Orbigny, 1853 (basis of record)
Bicrisia abyssicola Kluge, 1962 (basis of record)
Bitectiporidae MacGillivray, 1895 (basis of record)
Bowerbankia Farre, 1837 accepted as Amathia Lamouroux, 1812 (basis of record)
Bowerbankia citrina (Hincks, 1877) accepted as Amathia citrina (Hincks, 1877) (basis of record)
Bowerbankia gracilis Leidy, 1855 accepted as Amathia gracilis (Leidy, 1855) (basis of record)
Bowerbankia gracillima (Hincks, 1877) accepted as Amathia gracillima (Hincks, 1877) (basis of record)
Bowerbankia imbricata (Adams, 1798) accepted as Amathia imbricata (Adams, 1800) (basis of record)
Bowerbankia pustulosa (Ellis & Solander, 1786) accepted as Amathia pustulosa (Ellis & Solander, 1786) (basis of record)
Bryocryptellidae Vigneaux, 1949 (basis of record)
Buffonellaria Canu & Bassler, 1927 (basis of record)
Buffonellaria divergens (Smitt, 1873) (basis of record)
Bugula Oken, 1815 (basis of record)
Bugula avicularia (Linnaeus, 1758) accepted as Bugulina avicularia (Linnaeus, 1758) (basis of record)
Bugula calathus Norman, 1868 accepted as Bugulina calathus (Norman, 1868) (basis of record)
Bugula flabellata (Thompson in Gray, 1848) accepted as Bugulina flabellata (Thompson in Gray, 1848) (basis of record)
Bugula fulva Ryland, 1960 accepted as Bugulina fulva (Ryland, 1960) (basis of record)
Bugula neritina (Linnaeus, 1758) (basis of record)
Bugula plumosa (Pallas, 1766) accepted as Crisularia plumosa (Pallas, 1766) (basis of record)
Bugula purpurotincta Norman, 1868 accepted as Crisularia purpurotincta (Norman, 1868) (basis of record)
Bugula simplex Hincks, 1886 accepted as Bugulina simplex (Hincks, 1886) (basis of record)
Bugula stolonifera Ryland, 1960 accepted as Bugulina stolonifera (Ryland, 1960) (basis of record)
Bugula turbinata Alder, 1857 accepted as Bugulina turbinata (Alder, 1857) (basis of record)
Bugulidae Gray, 1848 (basis of record)
Bulbella Braem, 1951 (basis of record)
Bulbella abscondita Braem, 1951 (basis of record)
Buskea Heller, 1867 (basis of record)
Buskea dichotoma (Hincks, 1862) (basis of record)
Buskea nitida Heller, 1867 (basis of record)
Buskea quincuncialis (Norman, 1867) accepted as Buskea nitida Heller, 1867 (basis of record)
Buskia Alder, 1857 (basis of record)
Buskia nitens Alder, 1857 (basis of record)
Buskiidae Hincks, 1880 (basis of record)
Caberea Lamouroux, 1816 (basis of record)
Caberea boryi (Audouin, 1826) (basis of record)
Caberea ellisii (Fleming, 1814) (basis of record)
Callopora Gray, 1848 (basis of record)
Callopora craticula (Alder, 1856) (basis of record)
Callopora discreta (Hincks, 1862) (basis of record)
Callopora dumerilii (Audouin, 1826) (basis of record)
Callopora lineata (Linnaeus, 1767) (basis of record)
Callopora rylandi Bobin & Prenant, 1965 (basis of record)
Calloporidae Norman, 1903 (basis of record)