• Acicula bioculata Renier, 1847 accepted as Gordius macula Renier, 1804
• Acicula macula accepted as Gordius macula Renier, 1804
• Ascaris flustrae Dalyell, 1853 (nomen dubium)
• Ascaris longissima Gunnerus, 1770 accepted as Lineus longissimus (Gunnerus, 1770)
• Astemma collaris accepted as Amphiporus caecus Verrill, 1892
• Astemma filiformis (Johnston, 1828) accepted as Procephalothrix filiformis (Johnston, 1828) accepted as Cephalothrix filiformis (Johnston, 1828)
• Astemma gordius Parfitt, 1867 accepted as Oerstedia dorsalis (Abildgaard, 1806)
• Astemma longum accepted as Cephalothrix linearis (Rathke, 1799)
• Astemma resplendens accepted as Amphiporus caecus Verrill, 1892
• Astemma rufifrons accepted as Cephalothrix rufifrons (Johnston, 1837)
• Borlasia alba accepted as Amphiporus lactifloreus (Johnston, 1828)
• Borlasia alileuti accepted as Cerebratulus marginatus Renier, 1804
• Borlasia angliae accepted as Lineus longissimus (Gunnerus, 1770)
• Borlasia annellata accepted as Cerebratulus annellatus (Leuckart, 1849)
• Borlasia annulata (Ehrenberg, 1831) accepted as Notospermus geniculatus (Delle Chiaje, 1828)
• Borlasia bilineata accepted as Baseodiscus bilineatus (Schmarda, 1859)
• Borlasia camillea accepted as Emplectonema neesii (Örsted, 1843)
• Borlasia carmellina accepted as Baseodiscus delineatus (Delle Chiaje, 1825)
• Borlasia cephalothrix accepted as Cephalothrix linearis (Rathke, 1799)
• Borlasia echinoderma accepted as Emplectonema echinoderma (Marion, 1873)
• Borlasia elizabethae McIntosh, 1873-1874 accepted as Euborlasia elizabethae (McIntosh, 1873-1874)
• Borlasia filiformis accepted as Procephalothrix filiformis (Johnston, 1828) accepted as Cephalothrix filiformis (Johnston, 1828)
• Borlasia flaccida sensu Johnston, 1846 accepted as Emplectonema neesii (Örsted, 1843)
• Borlasia gesserensis accepted as Lineus ruber (Müller, 1774)
• Borlasia groenlandica accepted as Amphiporus groenlandicus Ørsted, 1843
• Borlasia hemprichii accepted as Baseodiscus hemprichii (Ehrenberg, 1831)
• Borlasia hermaphroditica accepted as Tetrastemma hermaphroditica (Keferstein, 1868)
• Borlasia incompta Ehlers, 1871 (nomen dubium)
• Borlasia inmaculata accepted as Euborlasia inmaculata (Bürger, 1892)
• Borlasia kefersteinii accepted as Tetrastemma kefersteinii (Marion, 1869)
• Borlasia kurtzii Girard, 1853 (taxon inquirendum)
• Borlasia lactea accepted as Ramphogordius lacteus Rathke, 1843 accepted as Lineus lacteus (Rathke, 1843)
• Borlasia linearis accepted as Cephalothrix linearis (Rathke, 1799)
• Borlasia longa accepted as Cephalothrix linearis (Rathke, 1799)
• Borlasia longissimus accepted as Lineus longissimus (Gunnerus, 1770)
• Borlasia mandilla accepted as Amphiporus lactifloreus (Johnston, 1828)
• Borlasia maslovskyi accepted as Zygonemertes maslovskyi (Czerniavski, 1880)
• Borlasia maslovskyi f. aberrans accepted as Zygonemertes maslovskyi (Czerniavski, 1880)
• Borlasia maslovskyi f. typica accepted as Zygonemertes maslovskyi (Czerniavski, 1880)
• Borlasia maslovskyi maslovskyi accepted as Zygonemertes maslovskyi (Czerniavski, 1880)
• Borlasia melanocephala accepted as Tetrastemma melanocephalum (Johnston, 1837)
• Borlasia melanocephala f. britannica accepted as Tetrastemma melanocephalum (Johnston, 1837)
• Borlasia melanocephala f. suchumica accepted as Tetrastemma melanocephalum (Johnston, 1837)
• Borlasia nigra accepted as Lineus longissimus (Gunnerus, 1770)
• Borlasia nigrofusca accepted as Nemertes nigrofuscus Ehrenberg, 1831
• Borlasia novae-zelandiae accepted as Amphiporus novaezelandiae (Quoy & Gaimard, 1833)
• Borlasia octoculata (taxon inquirendum)
• Borlasia olivacea accepted as Lineus viridis (Müller, 1774)
• Borlasia purpurea accepted as Lineus ruber (Müller, 1774)
• Borlasia quadripunctata accepted as Nemertopsis quadripunctata (Quoy & Gaimard, 1833)
• Borlasia quinquelineata Quoy & Gaimard, 1833 accepted as Baseodiscus quinquelineatus (Quoy & Gaimard, 1833)
• Borlasia rufa accepted as Lineus ruber (Müller, 1774)
• Borlasia rufifrons Johnston, 1837 accepted as Cephalothrix rufifrons (Johnston, 1837)
• Borlasia sanguinea accepted as Amphiporus sanguineus Girard, 1853
• Borlasia splendida Keferstein, 1862 accepted as Punnettia splendida (Keferstein, 1862)
• Borlasia splendida f. suchumica Czerniavsky, 1880
• Borlasia striata (taxon inquirendum)
• Borlasia tricuspida accepted as Notospermus tricuspidatus (Quoy & Gaimard, 1833)
• Borlasia tricuspidata accepted as Notospermus tricuspidatus (Quoy & Gaimard, 1833)
• Borlasia trilineata accepted as Lineopsella trilineata (Schmarda, 1859)
• Borlasia vermiculus accepted as Tetrastemma vermiculus (Quatrefages, 1846)
• Borlasia viridis Grube, 1840 (nomen dubium)
• Borlasia viridis Quoy & Gaimard, 1833 accepted as Ophiocephalus viridis (Quoy & Gaimard, 1833) accepted as Notospermus tricuspidatus (Quoy & Gaimard, 1833)
• Borlasia vittata accepted as Lineus vittatus (Quoy & Gaimard, 1833)
• Borlasia vivipara Ulyanina, 1870 accepted as Prosorhochmus viviparus (Ulyanin, 1870)
• Cephalonema brunniceps Stimpson, 1857 (nomen dubium)
• Chloraima siculum Kölliker, 1845 (nomen dubium)
• Fasciola angulata Müller, 1774 accepted as Amphiporus angulatus (Müller, 1774)
• Fasciola candida Müller, 1774 accepted as Tetrastemma candidum (Müller, 1774)
• Fasciola flaccida Müller, 1774
• Fasciola rosea Müller, 1774 accepted as Amphiporus roseus (Müller, 1774)
• Fasciola rubra Müller, 1774 accepted as Lineus ruber (Müller, 1774)
• Fasciola viridis Müller, 1774 accepted as Lineus viridis (Müller, 1774)
• Gordius albicans accepted as Amphiporus lactifloreus (Johnston, 1828)
• Gordius albus accepted as Lineus lacteus (Rathke, 1843)
• Gordius anguis accepted as Tubulanus superbus (Kölliker, 1845)
• Gordius annulatus Montagu, 1804 accepted as Tubulanus annulatus (Montagu, 1804)
• Gordius fasciatus Dalyell, 1853
• Gordius fasciatus spinifer accepted as Micrura fasciolata Ehrenberg, 1828
• Gordius fragilis accepted as Cerebratulus marginatus Renier, 1804
• Gordius fragilis spinifer accepted as Micrura fasciolata Ehrenberg, 1828
• Gordius fuscus accepted as Emplectonema neesii (Örsted, 1843)
• Gordius gesserensis Müller, 1780
• Gordius gracilis accepted as Procephalothrix filiformis (Johnston, 1828) accepted as Cephalothrix filiformis (Johnston, 1828)
• Gordius linearis accepted as Lineus linearis Montagu, 1808
• Gordius macula Renier, 1804 (nomen dubium)
• Gordius marinus accepted as Lineus longissimus (Gunnerus, 1770)
• Gordius maximus accepted as Lineus longissimus (Gunnerus, 1770)
• Gordius minor Dalyell, 1853
• Gordius minor albus
• Gordius oculatus Montagu, 1808
• Gordius purpureus Dalyell, 1853
• Gordius purpureus spinifer accepted as Micrura purpurea (Dalyell, 1853)
• Gordius spinifer Dalyell, 1853
• Gordius spinifer fasciatus accepted as Micrura fasciolata Ehrenberg, 1828
• Gordius spinifer fragilis accepted as Micrura fasciolata Ehrenberg, 1828
• Gordius spinifer viridis accepted as Gordius viridis spinifer Dalyell, 1853
• Gordius taenia accepted as Lineus bilineatus (Renier, 1804) accepted as Siphonenteron bilineatum Meneghini in Renier, 1847
• Gordius viridis represented as Gordius viridis spinifer Dalyell, 1853
• Gordius viridis spinifer Dalyell, 1853