Amphiporidae Oersted, 1844 (additional source)
Amphiporus Ehrenberg, 1831 (additional source)
Amphiporus allucens Bürger, 1895 (additional source)
Amphiporus bioculatus sensu Verrill, 1892 (additional source)
Amphiporus dissimulans Riches, 1893 (additional source)
Amphiporus elongatus Stephenson, 1911 accepted as Psammamphiporus elongatus (Stephenson, 1911) (source of synonymy)
Amphiporus lactifloreus (Johnston, 1828) (additional source)
Amphiporus langiaegeminus Bürger, 1895 (additional source)
Baseodiscus Diesing, 1850 (additional source)
Baseodiscus delineatus (Delle Chiaje, 1822) (additional source)
Bdellonemertea accepted as Malacobdellidae Blanchard, 1847 (additional source)
Callinera Bergendal, 1900 (additional source)
Callinera buergeri Bergendal, 1900 (additional source)
Callinera monensis Rogers, Gibson & Thorpe, 1992 (additional source)
Carcinonemertes Coe, 1902 (additional source)
Carcinonemertes carcinophila (Kölliker, 1845) (additional source)
Carcinonemertidae Sumner, Osburn & Cole, 1913 (additional source)
Carinesta Punnett, 1900 (additional source)
Carinesta anglica Wijnhoff, 1912 (additional source)
Carinina arenaria Hylbom, 1957 (additional source)
Carinina coei Hylbom, 1957 (additional source)
Carinoma Oudemans, 1885 (additional source)
Carinoma armandi (McIntosh, 1875) (additional source)
Carinomidae Bergendal, 1900 (additional source)
Cephalothricidae accepted as Cephalotrichidae McIntosh, 1873-1874 (additional source)
Cephalothrix Örsted, 1843 (additional source)
Cephalothrix arenaria Hylbom, 1957 (additional source)
Cephalothrix linearis (Rathke, 1799) (additional source)
Cephalothrix rufifrons (Johnston, 1837) (additional source)
Cerebratulidae accepted as Lineidae (additional source)
Cerebratulus Renier, 1804 (additional source)
Cerebratulus alleni Wijnhoff, 1912 (additional source)
Cerebratulus fuscus (McIntosh, 1874) (additional source)
Cerebratulus lacteus (Leidy, 1851) (basis of record)
Cerebratulus marginatus Renier, 1804 (additional source)
Cerebratulus pantherinus Hubrecht, 1879 (additional source)
Cerebratulus roseus (Delle Chiaje, 1841) (additional source)
Cratenemertidae Friedrich, 1968 (additional source)
Drepanophoridae (additional source)
Emplectonema echinoderma (Marion, 1873) (additional source)
Emplectonema gracile (Johnston, 1837) (additional source)
Emplectonematidae Bürger, 1904 (additional source)
Euborlasia Vaillant, 1890 (additional source)
Euborlasia elizabethae (McIntosh, 1873-1874) (additional source)
Hoplonemertini represented as Hoplonemertea (additional source)
Hubrechtella dubia Bergendal, 1902 (additional source)
Leucocephalonemertes Cantell, 1996 (additional source)
Leucocephalonemertes aurantiaca (Grube, 1855) (additional source)
Lineidae (additional source)
Lineus Sowerby, 1806 (additional source)
Lineus acutifrons Southern, 1913 (additional source)
Lineus bilineatus (Renier, 1804) accepted as Siphonenteron bilineatum Meneghini in Renier, 1847 (additional source)
Lineus coccinus Bürger, 1892 (additional source)
Lineus grubei (Hubrecht, 1879) (additional source)
Lineus lacteus (Rathke, 1843) (source of synonymy)
Lineus longissimus (Gunnerus, 1770) (additional source)
Lineus ruber (Müller, 1774) (additional source)
Lineus sanguineus (Rathke, 1799) (source of synonymy)
Lineus viridis (Müller, 1774) (additional source)
Malacobdella Blainville, 1827 (additional source)
Malacobdella grossa (Müller, 1776) (additional source)
Malacobdellidae Blanchard, 1847 (additional source)
Micrella Punnett, 1901 accepted as Zygeupolia Thompson, 1900 (additional source)
Micrella rufa Punnett, 1901 accepted as Zygeupolia rufa (Punnett, 1901) (additional source)
Micrura Ehrenberg, 1828 (additional source)
Micrura aurantiaca (Grube) accepted as Leucocephalonemertes aurantiaca (Grube, 1855) (source of synonymy)
Micrura baltica Cantell, 1975 (additional source)
Micrura elegans Senz, 1993 (additional source)
Micrura fasciolata Ehrenberg, 1828 (additional source)
Micrura lactea (Hubrecht) accepted as Cerebratulus lacteus (Leidy, 1851) (source of synonymy)
Micrura pseudovaricolor Senz, 1993 (additional source)
Micrura purpurea (Dalyell, 1853) (additional source)
Micrura rockalliensis Dollfus, 1924 (additional source)
Micrura scotica Stephenson, 1911 (additional source)
Monostilifera (additional source)
Myoisophagos Riser, 1994 accepted as Ramphogordius Rathke, 1843 (basis of record)
Myoisophagos lacteus accepted as Ramphogordius lacteus Rathke, 1843 accepted as Lineus lacteus (Rathke, 1843) (source of synonymy)
Nemertea incertae sedis (additional source)
Nemertopsis flavida (McIntosh, 1873-1874) (additional source)
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 crassus (Senz, 1993) (additional source)
Oerstedia dorsalis (Abildgaard, 1806) (additional source)
Oerstedia immutabilis (Riches, 1893) (additional source)
Oerstedia nigra (Riches, 1893) (additional source)
Oxypolia Punnett, 1901 (additional source)
Oxypolia beaumontiana Punnett, 1901 (additional source)
Paradrepanophoridae Stiasny-Wijnhoff (additional source)
Paradrepanophorus Stiasny-Wijnhoff, 1926 (additional source)
Paradrepanophorus crassus (Quatrefages, 1846) (additional source)
Poliopsis Joubin, 1890 (additional source)
Poliopsis lacazei Joubin, 1890 (additional source)
Polystilifera (additional source)
Procephalothrix Wijnhoff, 1913 accepted as Cephalothrix Örsted, 1843 (additional source)
Procephalothrix filiformis (Johnston, 1828) accepted as Cephalothrix filiformis (Johnston, 1828) (additional source)
Prosorhochmidae Bürger, 1895 (additional source)
Prosorhochmus Keferstein, 1862 (additional source)
Prosorhochmus claparedii Keferstein, 1862 (additional source)
Protubulanus Chernyshev, 1995 (additional source)