Acicula bioculata Renier, 1847 accepted as Acicula macula ([Renier], [1804])
Acicula macula ([Renier], [1804]) (uncertain > taxon inquirendum )
Ascaris flustrae Dalyell, 1853 (uncertain > nomen dubium )
Ascaris linearis (Rathke, 1799) accepted as Cephalothrix linearis (Rathke, 1799)
Ascaris longissima Gunnerus, 1770 accepted as Lineus longissimus (Gunnerus, 1770)
Ascaris pelagica Gunnerus, 1770 (uncertain > taxon inquirendum )
Ascaris rubra (Müller, 1774) accepted as Lineus ruber (Müller, 1774)
Cephalonema brunniceps Stimpson, 1857 (uncertain > nomen dubium )
Chloraima siculum Kölliker, 1845 (uncertain > nomen dubium )
Gordius gesserensis (Müller, 1780) (uncertain > taxon inquirendum )
Legnodesmus ehlersi Howell, 1958 †
Lobilabrum ostrearium Blainville, 1828 (uncertain > taxon inquirendum )
Meckelia albo-vittata Simpson, 1855 accepted as Notospermus albovittatus (Stimpson, 1855)
Meckelia albula Stimpson, 1857 accepted as Cerebratulus albulus (Stimpson, 1857)
Meckelia angulata accepted as Amphiporus angulatus (Müller, 1774)
Meckelia annulata
Meckelia asulcata McIntosh, 1874
Meckelia atra Girard, 1851 accepted as Dushia atra (Girard, 1851) sensu Girard, 1851
Meckelia atrocaerulea accepted as Lineus atrocaeruleus (Schmarda, 1859)
Meckelia atrocaeruleus accepted as Lineus atrocaeruleus (Schmarda, 1859)
Meckelia aurantiaca Grube, 1855 accepted as Leucocephalonemertes aurantiaca (Grube, 1855)
Meckelia australis Stimpson, 1857 accepted as Cerebratulus australis (Stimpson, 1857)
Meckelia beattiaei (Gray, 1857) accepted as Lineus beattiaei (Gray, 1857) accepted as Cerebratulus marginatus [Renier], [1804]
Meckelia bella accepted as Micrura bella (Stimpson, 1857)
Meckelia bilineata (Renier, 1804) accepted as Lineus bilineatus (Renier, 1804) accepted as Siphonenteron bilineatum Meneghini in Renier, 1847
Meckelia borealis Diesing, 1862 accepted as Cerebratulus borealis (Diesing, 1862)
Meckelia capensis Diesing, 1862 accepted as Meckelia macrorrhochma Schmarda, 1859 accepted as Cerebratulus macrorrhochmus (Schmarda, 1859)
Meckelia carmellina Quatrefages, 1846 accepted as Borlasia carmellina accepted as Baseodiscus delineatus (Delle Chiaje, 1822)
Meckelia carnea Diesing, 1850 accepted as Polystemma carneum Müller, 1774 accepted as Lineus ruber (Müller, 1774)
Meckelia cerebratulus
Meckelia ceylanica accepted as Micrura ceylanica (Schmarda, 1859)
Meckelia cingulata accepted as Lineus cingulatus (Stimpson, 1855)
Meckelia coeca Örsted, 1845 (uncertain > nomen dubium )
Meckelia depressa accepted as Cerebratulus depressus Quatrefages, 1846
Meckelia erythrorochma accepted as Cerebratulus erythrorochma Joubin, 1902
Meckelia fasciata accepted as Cerebratulus fasciatus Stimpson, 1857 accepted as Notospermus geniculatus (Delle Chiaje, 1822)
Meckelia fasciatus accepted as Cerebratulus fasciatus Stimpson, 1857 accepted as Notospermus geniculatus (Delle Chiaje, 1822)
Meckelia fragilis accepted as Micrura leidyi (Verrill, 1892)
Meckelia fusca (Fabricius, 1780) accepted as Nemertes fusca (Fabricius, 1780) accepted as Lineus ruber (Müller, 1774)
Meckelia gracilis Johnston, 1837 accepted as Nemertes gracilis Johnston, 1837 accepted as Emplectonema gracile (Johnston, 1837)
Meckelia impressa accepted as Micrura impressa (Stimpson, 1857)
Meckelia ingens accepted as Cerebratulus lacteus (Leidy, 1851)
Meckelia knerii Diesing, 1850 accepted as Cerebratulus knerii (Diesing, 1850) accepted as Notospermus geniculatus (Delle Chiaje, 1822)
Meckelia lactea Leidy, 1851 accepted as Cerebratulus lacteus (Leidy, 1851)
Meckelia leuckarti accepted as Cerebratulus annellatus (Leuckart, 1849)
Meckelia ligurica accepted as Cerebratulus liguricus Blanchard, 1849
Meckelia lizziae accepted as Cerebratulus lacteus (Leidy, 1851)
Meckelia lurida accepted as Tarrhomyos luridus (Verrill, 1873)
Meckelia macrorrhochma Schmarda, 1859 accepted as Cerebratulus macrorrhochmus (Schmarda, 1859)
Meckelia macrostoma Schmarda, 1859 accepted as Cerebratulus macrostomus (Schmarda, 1859)
Meckelia nigra Stimpson, 1855 accepted as Cerebratulus nigrus (Stimpson, 1855) accepted as Dushia nigra (Stimpson, 1855)
Meckelia nigrofusca accepted as Lineus nigrofuscus (Stimpson, 1857)
Meckelia oerstedii (van Beneden, 1861) accepted as Lineus bilineatus (Renier, 1804) accepted as Siphonenteron bilineatum Meneghini in Renier, 1847
Meckelia olivacea sensu Rathke, 1843
Meckelia olivacea sensu Stimpson, 1855 accepted as Cerebratulus oleaginus Stimpson, 1857
Meckelia paludicola accepted as Cerebratulus paludicolus Stimpson, 1857
Meckelia piperata Stimpson, 1855 accepted as Iwatanemertes piperata (Stimpson, 1855)
Meckelia pocohontas accepted as Cerebratulus lacteus (Leidy, 1851)
Meckelia rosea accepted as Micrura leidyi (Verrill, 1892)
Meckelia rubella Stimpson, 1855 accepted as Cerebratulus rubellus (Stimpson, 1855)
Meckelia serpentaria Diesing, 1850 accepted as Cerebratulus marginatus [Renier], [1804]
Meckelia sinensis Stimpson, 1855 accepted as Cerebratulus sinensis (Stimpson, 1855)
Meckelia somatotomus Leuckart, 1828 accepted as Cerebratulus marginatus [Renier], [1804]
Meckelia striata accepted as Myorhynchonemertes striata (Schmarda, 1859)
Meckelia striolenta Girard, 1853 accepted as Cerebratulus striolenta accepted as Cerebratulus striolentus (Girard, 1853)
Meckelia subacuta Stimpson, 1857 accepted as Cerebratulus subacutus (Stimpson, 1857)
Meckelia taenia (Dalyell, 1853) accepted as Lineus bilineatus (Renier, 1804) accepted as Siphonenteron bilineatum Meneghini in Renier, 1847
Meckelia trigonocephala accepted as Micrura trigonocephala (Schmarda, 1859)
Meckelia trilineata accepted as Tubulanus annulatus (Montagu, 1804)
Meckelia urticans Müller, 1854 accepted as Cerebratulus urticans (Müller, 1854)
Meckelia viridis accepted as Notospermus tricuspidatus (Quoy & Gaimard, 1833)
Meckelia vittata accepted as Lineus vittatus (Quoy & Gaimard, 1833)
Meckelia vittata var. violacea accepted as Lineus vittatus (Quoy & Gaimard, 1833)
Nemertes (Borlasia) olivacea Johnston, 1837 accepted as Lineus viridis (Müller, 1774)
Nemertes (Borlasia) rufifrons accepted as Cephalothrix rufifrons (Johnston, 1837)
Nemertes (Nemertes) gracilis Johnston, 1837 accepted as Emplectonema gracile (Johnston, 1837)
Nemertes (Nemertes) lactiflorea Johnston, 1837 accepted as Amphiporus lactifloreus (Johnston, 1828)
Nemertes (Nemertes) melanocephala Johnston, 1837 accepted as Tetrastemma melanocephalum (Johnston, 1837)
Nemertes (Nemertes) pulchra Johnston, 1837 accepted as Nipponnemertes pulcher (Johnston, 1837) accepted as Nipponnemertes pulchra (Johnston, 1837)
Nemertes (Nemertes) quadrioculata (Johnston, 1828) accepted as Tetrastemma candidum (Müller, 1774)
Nemertes affinis accepted as Micrura affinis (Stimpson, 1854)
Nemertes annellata Leuckart, 1849 accepted as Cerebratulus annellatus (Leuckart, 1849)
Nemertes antonina Quatrefages, 1846 accepted as Tetranemertes antonina (Quatrefages, 1846)
Nemertes assimilis Örsted, 1843
Nemertes badia (Rathke, 1799) accepted as Drepanophorus spectabilis (Quatrefages, 1846) accepted as Gibsonnemertes spectabilis (Quatrefages, 1846)
Nemertes balmea accepted as Emplectonema gracile (Johnston, 1837)
Nemertes bilineatus sensu Örsted, 1844
Nemertes bioculata Örsted, 1843 accepted as Cephalothrix rufifrons (Johnston, 1837)
Nemertes camillea accepted as Emplectonema neesii (Örsted, 1843)
Nemertes cartinophilos accepted as Carcinonemertes carcinophila (Kölliker, 1845)
Nemertes coeca Örsted, 1845 accepted as Meckelia coeca Örsted, 1845
Nemertes collaris accepted as Lineus collaris (Schmarda, 1859)
Nemertes communis van Beneden, 1861 accepted as Lineus ruber (Müller, 1774)
Nemertes complanata accepted as Cerebratulus complanatus (Kölliker, 1845)
Nemertes complanatus Kölliker, 1845 accepted as Cerebratulus complanatus (Kölliker, 1845)
Nemertes coronata (Quatrefages, 1846) accepted as Prostoma coronatum (Quatrefages, 1846)
Nemertes crassa (Quatrefages, 1846) accepted as Paradrepanophorus crassus (Quatrefages, 1846)
Nemertes delineatus (Delle Chiaje, 1825) accepted as Baseodiscus delineatus (Delle Chiaje, 1822)
Nemertes drepanensis Huschke, 1830 accepted as Notospermus geniculatus (Delle Chiaje, 1822)
Nemertes duoni accepted as Emplectonema duoni (Joubin, 1890)