Amphiporidae Örsted, 1843 (additional source)
Amphiporus Ehrenberg, 1831 (additional source)
Amphiporus angulatus (Müller, 1774) (additional source)
Amphiporus bicolor Bürger, 1895 (additional source)
Amphiporus binarius Korotkevich, 1978 (basis of record)
Amphiporus dissimulans Riches, 1893 (additional source)
Amphiporus groenlandicus Örsted, 1843 (additional source)
Amphiporus lactifloreus (Johnston, 1828) (additional source)
Amphiporus lancetoformis Korotkevich, 1978 (basis of record)
Amphiporus macracanthus Coe, 1905 (basis of record)
Amphiporus murmanicum Ushakov, 1928 (additional source)
Amphiporus murmanicus accepted as Amphiporus murmanicum Ushakov, 1928 (source of synonymy)
Amphiporus superbus (Girard in Stimpson, 1854) (additional source)
Baseodiscus Diesing, 1850 (additional source)
Bdellonemertea accepted as Malacobdellidae Blanchard, 1847 (additional source)
Bdellonemertini accepted as Malacobdellidae Blanchard, 1847 (additional source)
Carinina atavia (Bergendal, 1902) (additional source)
Carinina chupensis Korotkevich, 1982 (basis of record)
Carinina wijnhoffae Kulikova, 1984 (additional source)
Carinoma Oudemans, 1885 (additional source)
Carinoma uschakovi Chernyshev, 1999 (basis of record)
Carinomidae Bergendal, 1900 (additional source)
Cephalothricidae accepted as Cephalotrichidae McIntosh, 1874 (additional source)
Cephalothrix Örsted, 1843 (additional source)
Cephalothrix linearis (Rathke, 1799) (additional source)
Cerebratulidae Gibson, 1985 accepted as Lineidae McIntosh, 1874 (additional source)
Cerebratulus [Renier], [1804] (additional source)
Cerebratulus barentsi Bürger, 1895 (additional source)
Cerebratulus borealis (Diesing, 1862) (additional source)
Cerebratulus brevis Ushakov, 1926 (additional source)
Cerebratulus fuscus (McIntosh, 1874) (additional source)
Cerebratulus impressus Stimpson, 1857 accepted as Micrura impressa (Stimpson, 1857) (source of synonymy)
Cerebratulus longifissus Hubrecht, 1887 accepted as Heteronemertes longifissa (Hubrecht, 1887) (source of synonymy)
Cerebratulus longifissus sensu Punnett, 1903 accepted as Heteronemertes longifissa (Hubrecht, 1887) (basis of record)
Cerebratulus marginatus [Renier], [1804] (additional source)
Cerebratulus niveus (Punnett, 1903) (additional source)
Cerebratulus rigidus Isler, 1900 (additional source)
Cerebratulus zachsi Ushakov, 1926 (additional source)
Cratenemertidae Friedrich, 1968 (additional source)
Cryptonemertes Gibson, 1986 accepted as Oerstedia Quatrefages, 1846 (additional source)
Cryptonemertes actinophila (Bürger, 1904) accepted as Oerstedia actinophila (Bürger, 1904) (additional source)
Cyanophthalma cordiceps (Sars in Jensen, 1878) sensu Norenburg, 1986 accepted as Cyanophthalma vittata (Verrill, 1874) (additional source)
Dinonemertes Laidlaw, 1906 (additional source)
Dinonemertes alberti (Joubin, 1906) (additional source)
Dinonemertes arctica Korotkevich, 1977 (additional source)
Dinonemertidae Brinkmann, 1917 (additional source)
Emplectonema derjugini Ushakov, 1928 accepted as Neesia derjugini (Ushakov, 1928) (additional source)
Emplectonema gracile (Johnston, 1837) (additional source)
Emplectonematidae Bürger, 1904 (additional source)
Gurjanovella murmanica Ushakov, 1926 (source of synonymy)
Gurjanovella murmanicum Ushakov, 1926 accepted as Gurjanovella murmanica Ushakov, 1926 (basis of record)
Hoplonemertini represented as Hoplonemertea (additional source)
Lineidae McIntosh, 1874 (additional source)
Lineus Sowerby, 1805 (additional source)
Lineus angulatus accepted as Lineus angulosus Korotkevich, 1978 (source of synonymy)
Lineus atradentis Korotkevich, 1978 (basis of record)
Lineus callaris Korotkevich, 1978 (basis of record)
Lineus lancearius Korotkevich, 1978 (basis of record)
Lineus levinensis Korotkevich, 1978 (basis of record)
Lineus marisalbi Ushakov, 1926 (additional source)
Lineus quadratus Korotkevich, 1978 (basis of record)
Lineus ruber (Müller, 1774) (additional source)
Lineus sainthilairi Ushakov, 1926 (additional source)
Lineus sanguineus (Rathke, 1799) (source of synonymy)
Lineus schmidti Korotkevich, 1978 (basis of record)
Lineus trilobulatus Korotkevich, 1978 (basis of record)
Lineus viridis (Müller, 1774) (additional source)
Malacobdella Blainville, 1827 (additional source)
Malacobdella grossa (Müller, 1776) (additional source)
Malacobdellidae Blanchard, 1847 (additional source)
Micrura Ehrenberg, 1828 (additional source)
Micrura ancistroentis Korotkevich, 1978 (basis of record)
Micrura fasciolata Ehrenberg, 1828 (additional source)
Micrura lithotamnii Ushakov, 1928 (additional source)
Micrura varicolor Punnett, 1903 (additional source)
Monostilifera (additional source)
Nareda aberrans accepted as Tetrastemma aberrans Coe, 1901 (source of synonymy)
Nareda superba Girard in Stimpson, 1854 accepted as Amphiporus superbus (Girard in Stimpson, 1854) (source of synonymy)
Nemertea incertae sedis (additional source)
Nemertes Cuvier, 1816 accepted as Lineus Sowerby, 1805 (basis of record)
Nipponnemertes Friedrich, 1968 accepted as Nipponnemertes Gibson & Crandall, 1989 (additional source)
Nipponnemertes pulcher (Johnston, 1837) accepted as Nipponnemertes pulchra (Johnston, 1837) (additional source)
Oerstedia Quatrefages, 1846 (additional source)
Oerstedia dorsalis (Abildgaard, 1806) (additional source)
Pelagica (additional source)
Polystilifera (additional source)
Procarinina Bergendal, 1902 accepted as Carinina Hubrecht, 1885 (basis of record)
Procarinina atavia Bergendal, 1902 accepted as Carinina atavia (Bergendal, 1902) (basis of record)
Reptantia (additional source)
Tetrastemma Ehrenberg, 1831 (additional source)
Tetrastemma arctica Ushakov, 1926 accepted as Arctostemma arcticum (Ushakov, 1926) (additional source)
Tetrastemma arcticum Ushakov, 1926 accepted as Arctostemma arcticum (Ushakov, 1926) (source of synonymy)
Tetrastemma bicolor Coe, 1901 (basis of record)
Tetrastemma candidum (Müller, 1774) (additional source)
Tetrastemma laminariae Ushakov, 1928 (additional source)
Tetrastemma vermiculus (Quatrefages, 1846) (additional source)
Tetrastemmatidae Hubrecht, 1879 (additional source)
Tubulanidae Bürger, 1904 (1874) (additional source)
Tubulanus [Renier], [1804] (additional source)
Tubulanus annulatus (Montagu, 1804) (additional source)