Borlasia neesii (Örsted, 1843) accepted as Emplectonema neesii (Örsted, 1843) (original description)
Cephalothrix Örsted, 1843 (original description)
Cephalothrix bioculata Örsted, 1843 accepted as Cephalothrix linearis (Rathke, 1799) (original description)
Cephalothrix coeca Örsted, 1843 accepted as Cephalothrix linearis (Rathke, 1799) (original description)
Convoluta Ørsted, 1843 (original description)
Derostoma bistrigatum (Fabricius, 1826) Örsted, 1843 accepted as Mesostomum bistrigatum (Fabricius, 1826) Diesing, 1850 accepted as Mesostoma bistrigatum (Fabricius, 1826) Diesing, 1850 (new combination reference)
Derostoma gibbum (Fabricius, 1826) Örsted, 1843 accepted as Turbella gibba (Fabricius, 1826) Diesing, 1862 accepted as Planaria gibba Fabricius, 1826 (new combination reference)
Derostoma unipunctatum Ørsted, 1843 accepted as Phaenocora unipunctata (Ørsted, 1843) Bendl, 1908 (original description)
Gyrator suboviformis (Ørsted, 1843) Diesing, 1850 accepted as Graffiellus croceus (Fabricius, 1826) Hornung, 2016 (original description)
Macrostoma Ørsted, 1843 accepted as Macrostomum Schmidt, 1848 (original description)
Mesostoma ehrenbergii (Focke, 1836) Örsted, 1843 (new combination reference)
Monocelis fusca Örsted, 1843 (original description)
Monocelis lineata (Müller, 1773) Oersted, 1843 (new combination reference)
Monocelis subulata (Müller, 1777) Oersted, 1843 accepted as Monocelis lineata (Müller, 1773) Oersted, 1843 (new combination reference)
Nemertes assimilis Örsted, 1843 (original description)
Nemertes bioculata Örsted, 1843 accepted as Cephalothrix rufifrons (Johnston, 1837) (original description)
Nemertes maculata Örsted, 1843 (original description)
Nemertes pusilla Örsted, 1843 (original description)
Phaenocora unipunctata (Ørsted, 1843) Bendl, 1908 (original description)
Planaria affinis Ørsted, 1843 accepted as Foviella affinis (Ørsted, 1843) (original description)
Planaria appendiculata Fabricius, 1826 accepted as Macrostomum appendiculatum Fabricius, 1826 (source of synonymy)
Planaria obscura (Müller, 1773) Müller, 1776 accepted as Derostoma unipunctatum Ørsted, 1843 accepted as Phaenocora unipunctata (Ørsted, 1843) Bendl, 1908 (taxonomy source)
Planaria terrestris (Müller, 1773) Müller, 1776 accepted as Rhynchodemus terrestris (Müller, 1773) Leidy, 1851 accepted as Microplana terrestris (Müller OF, 1773) Linden, 1900 (additional source)
Polystemma pulchrum (Johnston, 1837) accepted as Nipponnemertes pulcher (Johnston, 1837) accepted as Nipponnemertes pulchra (Johnston, 1837) (new combination reference)
Prostoma littorale Oersted, 1843 accepted as Macrorhynchus croceus (Fabricius, 1826) Graff, 1882 accepted as Graffiellus croceus (Fabricius, 1826) Hornung, 2016 (original description)
Strongylostoma Ørsted, 1843 (original description)
Strongylostoma assimile Ørsted, 1843 accepted as Mesostomum assimile (Ørsted, 1843) Schultze, 1851 accepted as Mesostoma fusiforme (Duges, 1830) Ehrenberg, 1836 (original description)
Strongylostoma radiatum (Müller, 1773) Örsted, 1843 (new combination reference)
Telostomum mytili Ørsted, 1843 accepted as Tetracelis mytili (Ørsted, 1843) Diesing, 1850 accepted as Vortex mytili (Ørsted, 1843) Diesing, 1862 accepted as Enterostomum mytili (Ørsted, 1843) Graff, 1882 (original description)
Tetrastemma bioculatum Örsted, 1843 (original description)
Tetrastemma subpellucidum Ørsted, 1843 (original description)
Vortex littoralis Örsted, 1843 accepted as Gyrator littoralis (Örsted, 1843) Diesing, 1850 accepted as Provortex littoralis (Örsted, 1843) Graff, 1882 (original description)
Vortex truncata accepted as Vortex truncatus (Abildgaard, 1879) Ehrenberg, 1831 accepted as Jensenia truncata (Abildgaard, 1879) Graff, 1904-08 accepted as Castrella (Castrella) truncata (Abildgaard, 1789) Sekera, 1906 (basis of record)

Danish Exclusive Economic Zone for Telostomum mytili Ørsted, 1843 
Denmark for Fovia affinis (Ørsted, 1843) 
Norway for Convoluta paradoxa Ørsted, 1843