• Akrostomum stannii Grube, 1840
• Albanemertes rovinjensis Senz, 1993
• 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 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 giardinae Monastero, 1930 (uncertain > nomen dubium)
• Amphiporus glandulosus Bürger, 1895
• Amphiporus groenlandicus Örsted, 1843 (uncertain > nomen dubium)
• Amphiporus grubei (Diesing, 1850) (uncertain > nomen dubium)
• Amphiporus hastatus McIntosh, 1874 (uncertain > nomen dubium)
• 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 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
• Atrionemertes greenlandica Senz, 1993
• Carcinonemertes carcinophila (Kölliker, 1845)
• Communoporus cephalonephridialis (Friedrich, 1939)
• Communoporus hagmeieri (Friedrich, 1939)
• Communoporus rhynchocoelomicus (Friedrich, 1939)
• Cryptonemertes actinophila (Bürger, 1904) accepted as Oerstedia actinophila (Bürger, 1904)
• Cyanophthalma cordiceps (Sars in Jensen, 1878) sensu Norenburg, 1986 accepted as Cyanophthalma vittata (Verrill, 1874)
• Cyanophthalma obscura (Schultze, 1851)
• Cyanophthalma vittata (Verrill, 1874)
• Dananemertes saemundssoni Friedrich, 1957
• Duosnemertes marmorata Friedrich, 1955
• Emplectonema bocki Brunberg, 1957
• Emplectonema derjugini Ushakov, 1928 accepted as Neesia derjugini (Ushakov, 1928)
• Emplectonema duoni (Joubin, 1890)
• Emplectonema echinoderma (Marion, 1873)
• Emplectonema gracile (Johnston, 1837)
• Emplectonema intestinalis Friedrich, 1958
• Emplectonema marioni (Hubrecht, 1879)
• Emplectonema neesii (Örsted, 1843) accepted as Neesia neesii (Örsted, 1843)
• Emplectonema nordgaardi (Punnett, 1903)
• Emplectonema spongicola (Bergendal, 1903)
• Germanemertes baltica (Friedrich, 1939)
• Gononemertes parasita Bergendal, 1900
• Gurjanovella littoralis Ushakov, 1926
• Gurjanovella murmanica Ushakov, 1926
• Gurjanovella murmanicum Ushakov, 1926 accepted as Gurjanovella murmanica Ushakov, 1926
• Malacobdella grossa (Müller, 1776)
• Minutanemertes adiverticulata Senz, 1993
• Minutanemertes alba Senz, 1993
• Minutanemertes schifkoi Senz, 1996
• Nareda superba Girard in Stimpson, 1854
• Neesia derjugini (Ushakov, 1928)
• Neesia neesii (Örsted, 1843)
• Nemertellina canea Friedrich, 1935
• Nemertellina minuta Friedrich, 1935
• Nemertellina oculata Friedrich, 1935
• Nemertellopsis cephalotrichiformis Friedrich, 1935
• Nemertellopsis macrodasys Friedrich, 1935
• Nemertellopsis typica Friedrich, 1936
• Nemertes (Borlasia) rufifrons Johnston, 1837 accepted as Cephalothrix rufifrons (Johnston, 1837)
• Nemertopsis bivittata (Delle Chiaje, 1841)
• Nemertopsis capitulata Timofeev, 1911