Aetheolineus Senz, 1993 (basis of record)
Aetheolineus pulcherrimus Senz, 1993 (basis of record)
Albanemertes rovinjensis Senz, 1993 (basis of record)
Amorphonemertes Cantell, 1998 (basis of record)
Amorphonemertes kubergensis Cantell, 1998 (basis of record)
Amphiporidae Oersted, 1844 (basis of record)
Amphiporus Ehrenberg, 1831 (basis of record)
Amphiporus allucens Bürger, 1895 (basis of record)
Amphiporus angulatus (Müller, 1774) (basis of record)
Amphiporus binocellatus Senz, 1993 (basis of record)
Amphiporus bioculatus sensu Verrill, 1892 (basis of record)
Amphiporus dissimulans Riches, 1893 (basis of record)
Amphiporus glandulosus Bürger, 1895 (basis of record)
Amphiporus lactifloreus (Johnston, 1828) (basis of record)
Amphiporus langiaegeminus Bürger, 1895 (basis of record)
Amphiporus murmanicum Ushakov, 1928 (basis of record)
Amphiporus superbus (Stimpson, 1854) (basis of record)
Annulonemertes minusculus Berg, 1985 (basis of record)
Arctonemertes Friedrich, 1957 (basis of record)
Arctonemertes thori Friedrich, 1957 (basis of record)
Arenonemertes Friedrich, 1933 (basis of record)
Arenonemertes microps Friedrich, 1933 (basis of record)
Armaueria Brinkmann, 1917 (basis of record)
Armaueria rubra Brinkmann, 1917 (basis of record)
Armaueriidae Brinkmann, 1917 (basis of record)
Atrionemertes Senz, 1993 (basis of record)
Atrionemertes greenlandica Senz, 1993 (basis of record)
Balaenanemertes Bürger, 1909 (basis of record)
Balaenanemertes chavesi (Joubin, 1906) (basis of record)
Balaenanemertes grandis Brinkmann, 1917 (basis of record)
Balaenanemertes hjorti Brinkmann, 1917 (basis of record)
Balaenanemertes lata Brinkmann, 1917 (basis of record)
Balaenanemertes lobata (Joubin, 1906) (basis of record)
Balaenanemertes musculocaudata Brinkmann, 1917 (basis of record)
Balaenanemertidae (basis of record)
Baseodiscus Diesing, 1850 (basis of record)
Baseodiscus abyssorum (Joubin, 1902) (basis of record)
Baseodiscus delineatus (Delle Chiaje, 1822) (basis of record)
Baseodiscus filholi (Joubin, 1902) (basis of record)
Baseodiscus minor (Hubrecht, 1879) (basis of record)
Brinkmannia Stiasny-Wijnhoff, 1926 (basis of record)
Brinkmannia mediterranea Stiasny-Wijnhoff, 1926 (basis of record)
Brinkmanniidae Stiasny-Wijnhoff (basis of record)
Buergeriella Brinkmann, 1917 (basis of record)
Buergeriella notabilis Brinkmann, 1917 (basis of record)
Buergeriellidae Brinkmann, 1917 (basis of record)
Callinera Bergendal, 1900 (basis of record)
Callinera buergeri Bergendal, 1900 (basis of record)
Callinera grandis Bergendal, 1903 (basis of record)
Callinera monensis Rogers, Gibson & Thorpe, 1992 (basis of record)
Callinera zhirmunskyi Chernyshev, 2002 (basis of record)
Calonemertes Coe, 1945 (basis of record)
Calonemertes hardyi (Wheeler, 1934) (basis of record)
Carcinonemertes Coe, 1902 (basis of record)
Carcinonemertidae Sumner, Osburn & Cole, 1913 (basis of record)
Carinesta Punnett, 1900 (basis of record)
Carinesta anglica Wijnhoff, 1912 (basis of record)
Carinina Hubrecht, 1885 (basis of record)
Carinina arenaria Hylbom, 1957 (basis of record)
Carinina atavia (Bergendal, 1902) (basis of record)
Carinina buddenbrocki (Friedrich, 1935) (basis of record)
Carinina burgeri Joubin, 1902 (basis of record)
Carinina coei Hylbom, 1957 (basis of record)
Carinina heterosoma Müller, 1965 (basis of record)
Carinina poseidoni Friedrich, 1935 (basis of record)
Carinina remanei (Nawitzki, 1931) (basis of record)
Carinina wijnhoffae Kulikova, 1984 (basis of record)
Carinoma Oudemans, 1885 (basis of record)
Carinoma armandi (McIntosh, 1875) (basis of record)
Carinomidae Bergendal, 1900 (basis of record)
Cephalothricidae accepted as Cephalotrichidae McIntosh, 1873-1874 (basis of record)
Cephalothrix Örsted, 1843 (basis of record)
Cephalothrix arenaria Hylbom, 1957 (basis of record)
Cephalothrix atlantica Gerner, 1969 (basis of record)
Cephalothrix bipunctata Bürger, 1892 (basis of record)
Cephalothrix buergeri Wijnhoff, 1913 (basis of record)
Cephalothrix germanica Gerner, 1969 (basis of record)
Cephalothrix lactea Senz, 1993 (basis of record)
Cephalothrix linearis (Rathke, 1799) (basis of record)
Cephalothrix mediterranea Gerner, 1969 (basis of record)
Cephalothrix paragermanica Senz, 1993 (basis of record)
Cephalothrix rufifrons (Johnston, 1837) (basis of record)
Cephalotrichella Wijnhoff, 1913 (basis of record)
Cephalotrichella signata (Hubrecht, 1879) (basis of record)
Cerebratulus Renier, 1804 (basis of record)
Cerebratulus acutus Nardo, 1847 (basis of record)
Cerebratulus aerugatus Bürger, 1892 (basis of record)
Cerebratulus alleni Wijnhoff, 1912 (basis of record)
Cerebratulus anguillula Bürger, 1892 (basis of record)
Cerebratulus annellatus (Leuckart, 1849) (basis of record)
Cerebratulus aureolus Bürger, 1892 (basis of record)
Cerebratulus barentsi Bürger, 1895 (basis of record)
Cerebratulus bivittatus Uljanin, 1870 (basis of record)
Cerebratulus borealis (Diesing, 1862) (basis of record)
Cerebratulus brevis Ushakov, 1926 (basis of record)
Cerebratulus cestoides Bürger, 1895 (basis of record)
Cerebratulus complanatus (Kölliker, 1845) (basis of record)
Cerebratulus croceus Grube, 1864 (basis of record)
Cerebratulus depressus Quatrefages, 1846 (basis of record)
Cerebratulus eisigii Hubrecht, 1880 (basis of record)