• Aetheolineus pulcherrimus Senz, 1993
• Akrostomum stannii Grube, 1840
• Albanemertes rovinjensis Senz, 1993
• Amorphonemertes kubergensis Cantell, 1998
• Amphiporella baltica Friedrich, 1939 accepted as Germanemertes baltica (Friedrich, 1939)
• Amphiporus adriaticus (Ehrenberg, 1828) (uncertain > nomen dubium)
• Amphiporus allucens Bürger, 1895
• Amphiporus angulatus (Müller, 1774)
• Amphiporus appendiculatus Friedrich, 1957 (uncertain > taxon inquirendum)
• Amphiporus arcticus Punnett, 1901 (uncertain > taxon inquirendum)
• Amphiporus atypicus Friedrich, 1935 (uncertain > taxon inquirendum)
• Amphiporus bicolor Bürger, 1895 (uncertain > taxon inquirendum)
• Amphiporus binocellatus Senz, 1993
• Amphiporus bioculatus sensu Verrill, 1892 (uncertain)
• Amphiporus caecus Verrill, 1892 (uncertain > nomen dubium)
• Amphiporus canescens (Leuckart, 1849) (uncertain > nomen dubium)
• Amphiporus carinelloides Bürger, 1895 (uncertain > nomen dubium)
• Amphiporus dissimulans Riches, 1893
• Amphiporus dubius Hubrecht, 1879 (uncertain > nomen dubium)
• Amphiporus elongatus Stephenson, 1911 accepted as Psammamphiporus elongatus (Stephenson, 1911) accepted as Tetrastemma elongatum (Stephenson, 1911)
• Amphiporus fabricii Levinsen, 1879 (uncertain > nomen dubium)
• Amphiporus flavens Monastero, 1930 (uncertain > nomen dubium)
• Amphiporus frontalis Verrill, 1892 (uncertain > nomen dubium)
• Amphiporus giardinae Monastero, 1930 (uncertain > nomen dubium)
• Amphiporus glandulosus Bürger, 1895
• Amphiporus griseus (Stimpson, 1855)
• Amphiporus groenlandicus Örsted, 1843 (uncertain > nomen dubium)
• Amphiporus grubei (Diesing, 1850) (uncertain > nomen dubium)
• Amphiporus hastatus McIntosh, 1874 (uncertain > nomen dubium)
• Amphiporus heterosorus Verrill, 1892
• Amphiporus islandicus Friedrich, 1957 (uncertain > taxon inquirendum)
• Amphiporus julii Giard, 1890 (uncertain > nomen dubium)
• Amphiporus korschelti Friedrich, 1939 (uncertain > taxon inquirendum)
• Amphiporus lactifloreus (Johnston, 1828)
• Amphiporus langiaegeminus Bürger, 1895 (uncertain > nomen dubium)
• Amphiporus marmoratus Hubrecht, 1879 (uncertain > nomen dubium)
• Amphiporus martyi Oxner, 1907 (uncertain > nomen dubium)
• Amphiporus multioculatus (Kölliker, 1845) (uncertain > nomen dubium)
• Amphiporus murmanicum Ushakov, 1928
• Amphiporus nigrostriatus Timofeev, 1911 (uncertain > nomen dubium)
• Amphiporus ochraceus (Verrill, 1873)
• Amphiporus oligommatus Bürger, 1895 (uncertain > nomen dubium)
• Amphiporus pellucidus (Örsted, 1843) (uncertain > nomen dubium)
• Amphiporus polyommatus Bürger, 1895 (uncertain > nomen dubium)
• Amphiporus pugnax Hubrecht, 1879 (uncertain > nomen dubium)
• Amphiporus punnetti (Friedrich, 1957) (uncertain > taxon inquirendum)
• Amphiporus reticulatus Bürger, 1895 (uncertain > nomen dubium)
• Amphiporus roseus (Müller, 1774) (uncertain > nomen dubium)
• Amphiporus rufostriatus Bergendal, 1903 (uncertain > nomen dubium)
• Amphiporus septentrionalis Friedrich, 1957 (uncertain > taxon inquirendum)
• Amphiporus sipunculus Saint-Loup, 1886 (uncertain > nomen dubium)
• Amphiporus superbus (Girard in Stimpson, 1854) accepted as Nareda superba Girard in Stimpson, 1854
• Amphiporus thompsoni Punnett, 1901 (uncertain > nomen dubium)
• Amphiporus validissimus Bürger, 1895 (uncertain > nomen dubium)
• Amphiporus virgatus Bürger, 1895 (uncertain > nomen dubium)
• Amphiporus vitae Monastero, 1930 (uncertain > nomen dubium)
• Annulonemertes minuscula Berg, 1985
• Annulonemertes minusculus Berg, 1985 accepted as Annulonemertes minuscula Berg, 1985
• Arctonemertes thori Friedrich, 1957
• Arctostemma arcticum (Ushakov, 1926)
• Arenonemertes arenicola Hylbom, 1991
• Arenonemertes arenicolus Hylbom, 1991 accepted as Arenonemertes arenicola Hylbom, 1991
• Arenonemertes microps Friedrich, 1933
• Arenonemertes minuta Friedrich, 1949
• Arenonemertes minutus Friedrich, 1949 accepted as Arenonemertes minuta Friedrich, 1949
• Armaueria rubra Brinkmann, 1917
• Astemma filiformis (Johnston, 1828) accepted as Cephalothrix filiformis (Johnston, 1828)
• Astemma longum Örsted, 1843 accepted as Cephalothrix linearis (Rathke, 1799)
• Astemma rufifrons (Johnston, 1837) accepted as Cephalothrix rufifrons (Johnston, 1837)
• Atrionemertes greenlandica Senz, 1993
• Avenardia priei Giard, 1878 accepted as Cerebratulus marginatus [Renier], [1804]
• Balaenanemertes chavesi (Joubin, 1906)
• Balaenanemertes grandis Brinkmann, 1917
• Balaenanemertes hjorti Brinkmann, 1917
• Balaenanemertes lata Brinkmann, 1917
• Balaenanemertes lobata (Joubin, 1906)
• Balaenanemertes musculocaudata Brinkmann, 1917
• Baseodiscus abyssorum (Joubin, 1902)
• Baseodiscus delineatus (Delle Chiaje, 1822)
• Baseodiscus filholi (Joubin, 1902)
• Baseodiscus minor (Hubrecht, 1879)
• Baseodiscus pellucidus (Kennel, 1891)
• Bilucernus grubei (Hubrecht, 1879)
• Borlasia annellata accepted as Cerebratulus annellatus (Leuckart, 1849)
• Borlasia cephalothrix Diesing, 1850 accepted as Cephalothrix linearis (Rathke, 1799)
• Borlasia filiformis (Johnston, 1828) accepted as Procephalothrix filiformis (Johnston, 1828) accepted as Cephalothrix filiformis (Johnston, 1828)
• Borlasia linearis (Rathke, 1799) accepted as Cephalothrix linearis (Rathke, 1799)
• Borlasia longa (Örsted, 1843) accepted as Cephalothrix linearis (Rathke, 1799)
• Borlasia rufifrons Johnston, 1837 accepted as Cephalothrix rufifrons (Johnston, 1837)
• Brinkmannia mediterranea Stiasny-Wijnhoff, 1926
• Buergeriella notabilis Brinkmann, 1917
• Callinera buergeri Bergendal, 1900
• Callinera buergeri f. grandis accepted as Callinera grandis Bergendal, 1903
• Callinera grandis Bergendal, 1903
• Callinera monensis Rogers, Gibson & Thorpe, 1992
• Calonemertes hardyi (Wheeler, 1934)
• Carcinonemertes carcinophila (Kölliker, 1845)
• Carinella albida Bürger, 1892 accepted as Tubulanus linearis (McIntosh, 1874)
• Carinella ambigua Punnett, 1903 accepted as Tubulanus ambiguus (Punnett, 1903)
• Carinella aragoi Joubin, 1890 accepted as Tubulanus annulatus (Montagu, 1804)