Aphroditiformia (original description)
Axionice flexuosa (Grube, 1860) (additional source)
Dasychone dalyelli Levinsen, 1883 accepted as Branchiomma bombyx (Dalyell, 1853) (original description)
Eteone papillifera (Théel, 1879) accepted as Mysta barbata Malmgren, 1865 (basis of record)
Eteone striata Levinsen, 1882 accepted as Eteone barbata (Malmgren, 1865) accepted as Mysta barbata Malmgren, 1865 (original description)
Eteone villosa Levinsen, 1882 accepted as Eteone longa (Fabricius, 1780) (original description)
Harmothoe borealis (Théel, 1879) (additional source)
Nerillidae Levinsen, 1883 (original description)
Nicolea arctica Malmgren, 1866 accepted as Nicolea venustula (Montagu, 1819) (source of synonymy)
Notaulax Tauber, 1879 (additional source)
Pectinaria robusta Levinsen, 1883 accepted as Lagis koreni Malmgren, 1866 (original description)
Phyllodociformia (original description)
Polynoe borealis Théel, 1879 accepted as Harmothoe borealis (Théel, 1879) (source of synonymy)
Sabellida (original description)
Sphaerosyllis latipalpis Levinsen, 1883 (original description)
Spinther major Levinsen, 1883 accepted as Spinther oniscoides Johnson, 1845 (original description)
Spirorbis affinis Levinsen, 1883 accepted as Laeospira granulata (Linnaeus, 1767) accepted as Janua heterostropha (Montagu, 1803) (original description)
Spirorbis violaceus Levinsen, 1883 accepted as Paradexiospira violaceus (Levinsen, 1883) represented as Paradexiospira (Paradexiospira) violacea (Levinsen, 1883) (original description)
Terebelliformia (original description)
Trachelophyllum Levinsen, 1883 accepted as Notophyllum Örsted, 1843 (original description)
Trachelophyllum luetkeni Levinsen, 1883 accepted as Notophyllum foliosum (Sars, 1835) (original description)
Trochochaeta sarsi Levinsen, 1884 accepted as Trochochaeta multisetosa (Örsted, 1844) (original description)