Baseodiscus Diesing, 1850 (additional source)
Baseodiscus delineatus (Delle Chiaje, 1825) (additional source)
Cerebratulidae accepted as Lineidae (additional source)
Cerebratulus Renier, 1804 (additional source)
Cerebratulus marginatus Renier, 1804 (additional source)
Emplectonema gracile (Johnston, 1837) (additional source)
Emplectonematidae Bürger, 1904 (additional source)
Fasciola rubra Müller, 1774 accepted as Lineus ruber (Müller, 1774) (source of synonymy)
Gordius Linnaeus, 1758 (basis of record)
Gordius annulatus Montagu, 1804 accepted as Tubulanus annulatus (Montagu, 1804) (source of synonymy)
Hoplonemertini represented as Hoplonemertea (additional source)
Lineidae (additional source)
Lineus Sowerby, 1806 (additional source)
Lineus bilineatus (Renier, 1804) accepted as Siphonenteron bilineatum Meneghini in Renier, 1847 (additional source)
Lineus gesserensis (O.F. Müller, 1774) (source of synonymy)
Lineus ruber (Müller, 1774) (additional source)
Meckelia Leuckart, 1828 accepted as Cerebratulus Renier, 1804 (basis of record)
Monostilifera (additional source)
Nemertea incertae sedis (additional source)
Nemertes Cuvier, 1817 (basis of record)
Nemertes gracilis Johnston, 1837 accepted as Emplectonema gracile (Johnston, 1837) (source of synonymy)
Oerstedia Quatrefages, 1846 (additional source)
Oerstedia dorsalis (Abildgaard, 1806) (additional source)
Oxypolia Punnett, 1901 (additional source)
Oxypolia beaumontiana Punnett, 1901 (additional source)
Planaria Müller, 1776 (basis of record)
Planaria dorsalis Abildgaard, 1806 accepted as Oerstedia dorsalis (Abildgaard, 1806) (source of synonymy)
Polia Delle Chiaje, 1825 accepted as Baseodiscus Diesing, 1850 (basis of record)
Polia delineata Delle Chiaje, 1825 accepted as Baseodiscus delineatus (Delle Chiaje, 1825) (source of synonymy)
Poliopsis Joubin, 1890 (additional source)
Poliopsis lacazei Joubin, 1890 (additional source)
Siphonenteron Meneghini in Renier, 1847 (source of synonymy)
Siphonenteron bilineatum Meneghini in Renier, 1847 (source of synonymy)
Tubulanidae (additional source)
Tubulanus Renier, 1804 (additional source)
Tubulanus annulatus (Montagu, 1804) (additional source)
Tubulanus polymorphus Renier, 1804 (additional source)
Valenciniidae Hubrecht, 1879 (additional source)