Asychis amoena (Kinberg, 1866) accepted as Chirimia amoena (Kinberg, 1866) (basis of record)
Asychis biceps (M. Sars, 1861) accepted as Chirimia biceps biceps (Sars, 1861) (basis of record)
Asychis elongata (Verrill, 1873) accepted as Sabaco elongatus (Verrill, 1873) (new combination reference)
Asychis gotoi (Izuka, 1902) accepted as Metasychis gotoi (Izuka, 1902) (basis of record)
Asychis urceolata (Leidy, 1855) accepted as Clymene urceolatus Leidy, 1855 (source of synonymy)
Axiothea catenata Malmgren, 1865 accepted as Axiothella catenata (Malmgren, 1865) (source of synonymy)
Axiothella catenata (Malmgren, 1865) (additional source)
Axiothella somersi (Verrill, 1900) (basis of record)
Chrysothemis amoena Kinberg, 1866 accepted as Chirimia amoena (Kinberg, 1866) (source of synonymy)
Clymene affinis M. Sars in G.O. Sars, 1872 accepted as Praxillella affinis (M. Sars in G.O. Sars, 1872) (source of synonymy)
Clymene biceps Sars, 1861 accepted as Chirimia biceps biceps (Sars, 1861) (source of synonymy)
Clymene borealis Dalyell, 1853 (source of synonymy)
Clymene cirrosa Sars, 1851 (basis of record)
Clymene droebachiensis Sars, 1872 accepted as Euclymene droebachiensis (Sars, 1872) (source of synonymy)
Clymene gracilis Sars, 1861 accepted as Praxillella gracilis (M. Sars, 1861) (source of synonymy)
Clymene insignis Baird, 1871 (taxonomy source)
Clymene integrinatis Haswell, 1883 accepted as Petaloproctus integrinatis (Haswell, 1883) (source of synonymy)
Clymene intermedia Örsted, 1844 accepted as Praxillella praetermissa (Malmgren, 1865) (source of synonymy)
Clymene koreni Hansen, 1879 accepted as Maldane sarsi Malmgren, 1865 (source of synonymy)
Clymene leiopygos Grube, 1860 accepted as Leiochone leiopygos (Grube, 1860) (source of synonymy)
Clymene muelleri Sars, 1856 accepted as Proclymene muelleri (Sars, 1856) (source of synonymy)
Clymene neapolitana Delle Chiaje, 1841 (basis of record)
Clymene oerstedii Claparède, 1863 accepted as Euclymene oerstedii (Claparède, 1863) (source of synonymy)
Clymene palermitana Grube, 1840 accepted as Euclymene palermitana (Grube, 1840) (source of synonymy)
Clymene planiceps M. Sars in G.O. Sars, 1872 accepted as Isocirrus planiceps (M. Sars in G.O. Sars, 1872) (source of synonymy)
Clymene quadrilobata Sars, 1856 accepted as Praxillella quadrilobata (M. Sars, 1856) (source of synonymy)
Clymene spatulata Grube, 1855 accepted as Petaloproctus terricolus Quatrefages, 1866 (source of synonymy)
Clymene urceolatus Leidy, 1855 (status source)
Clymenella (Axiothella) somersi Verrill, 1900 accepted as Axiothella somersi (Verrill, 1900) (source of synonymy)
Clymenella torquata (Leidy, 1855) (additional source)
Clymenura polaris (Théel, 1879) (additional source)
Euclymene collaris (Claparède, 1869) (additional source)
Euclymene dispar (Verrill, 1873) (basis of record)
Euclymene droebachiensis (Sars, 1872) (additional source)
Euclymene palermitana (Grube, 1840) (additional source)
Euclymeninae Arwidsson, 1906 (original description)
Heteroclymene Arwidsson, 1906 (original description)
Heteroclymene koellikeri (McIntosh, 1885) accepted as Clymenella koellikeri (McIntosh, 1885) (source of synonymy)
Heteroclymene robusta Arwidsson, 1906 (original description)
Isocirrus Arwidsson, 1906 (original description)
Isocirrus planiceps (M. Sars in G.O. Sars, 1872) (new combination reference)
Johnstonia gracilis Kinberg, 1866 accepted as Euclymene oerstedii (Claparède, 1863) (additional source)
Leiocephalus Quatrefages, 1866 accepted as Leiochone Grube, 1868 (status source)
Leiochone Grube, 1868 (additional source)
Leiochone borealis Arwidsson, 1906 accepted as Clymenura borealis (Arwidsson, 1906) (source of synonymy)
Leiochone borealis Arwidsson, 1906 accepted as Clymenura borealis (Arwidsson, 1906) (original description)
Leiochone clypeata Saint-Joseph, 1894 accepted as Leiochone leiopygos (Grube, 1860) (source of synonymy)
Leiochone leiopygos (Grube, 1860) (new combination reference)
Leiochone polaris (Théel, 1879) accepted as Clymenura polaris (Théel, 1879) (new combination reference)
Leiochonini Arwidsson, 1906 (original description)
Lumbriclymene minor Arwidsson, 1906 (original description)
Lumbriclymeninae Arwidsson, 1906 (original description)
Lumbricus sabellaris Müller, 1788 (basis of record)
Lumbricus tubicola Müller, 1788 accepted as Lumbriclymene cylindricauda Sars, 1872 (source of synonymy)
Maldane atlantica McIntosh, 1885 (basis of record)
Maldane coronata Moore, 1903 accepted as Metasychis gotoi (Izuka, 1902) (source of synonymy)
Maldane filifera Verrill, 1879 accepted as Petaloproctus filifer (Verrill, 1879) (source of synonymy)
Maldane sarsi Malmgren, 1865 (additional source)
Maldane tenuis Théel, 1879 accepted as Petaloproctus tenuis (Théel, 1879) (taxonomy source)
Maldaninae Malmgren, 1867 (status source)
Maldanopsis Verrill, 1900 accepted as Sabaco Kinberg, 1866 (source of synonymy)
Microclymene Arwidsson, 1906 (original description)
Microclymene acirrata Arwidsson, 1906 (original description)
Microclymene tricirrata Arwidsson, 1906 (original description)
Nicomache Malmgren, 1865 (taxonomy source)
Nicomache (Loxochona) Arwidsson, 1906 (original description)
Nicomache (Loxochona) quadrispinata Arwidsson, 1906 (original description)
Nicomache (Loxochona) trispinata Arwidsson, 1906 (original description)
Nicomache benthaliana McIntosh, 1885 (basis of record)
Nicomache dispar Verrill, 1873 accepted as Euclymene dispar (Verrill, 1873) (source of synonymy)
Nicomache lumbricalis borealis Arwidsson, 1906 (original description)
Nicomache minor Arwidsson, 1906 represented as Nicomache (Nicomache) minor Arwidsson, 1906 (original description)
Nicomachella picta Ehlers, 1887 accepted as Praxillura picta (Ehlers, 1887) (source of synonymy)
Nicomachinae Arwidsson, 1906 (original description)
Notoproctus Arwidsson, 1906 (original description)
Notoproctus oculatus Arwidsson, 1906 (original description)
Notoproctus oculatus arcticus Arwidsson, 1906 (original description)
Notoproctus oculatus minor Arwidsson, 1906 (original description)
Paraxiothea latens Webster, 1879 accepted as Clymenella torquata (Leidy, 1855) (source of synonymy)
Petaloproctus filifer (Verrill, 1879) (new combination reference)
Petaloproctus integrinatis (Haswell, 1883) (basis of record)
Petaloproctus tenuis (Théel, 1879) (new combination reference)
Petaloproctus tenuis borealis Arwidsson, 1906 accepted as Petaloproctus borealis Ardwisson, 1906 (original description)
Petaloproctus terricola Quatrefages, 1866 accepted as Petaloproctus terricolus Quatrefages, 1866 (additional source)
Praxilla arctica Malmgren, 1867 accepted as Praxillella praetermissa (Malmgren, 1865) (source of synonymy)
Praxilla collaris Claparède, 1869 accepted as Euclymene collaris (Claparède, 1869) (source of synonymy)
Praxilla kerguelensis McIntosh, 1885 accepted as Praxillella kerguelensis (McIntosh, 1885) (status source)
Praxilla koellikeri McIntosh, 1885 accepted as Clymenella koellikeri (McIntosh, 1885) (source of synonymy)
Praxilla nigrita Ehlers, 1874 accepted as Praxillella nigrita (Ehlers, 1874) (additional source)
Praxilla occidentalis McIntosh, 1885 accepted as Praxillella occidentalis (McIntosh, 1885) (additional source)
Praxilla polaris Théel, 1879 accepted as Clymenura polaris (Théel, 1879) (new combination reference)
Praxilla praetermissa Malmgren, 1865 accepted as Praxillella praetermissa (Malmgren, 1865) (source of synonymy)
Praxillella affinis (M. Sars in G.O. Sars, 1872) (additional source)
Praxillella gracilis (M. Sars, 1861) (additional source)
Praxillella kerguelensis (McIntosh, 1885) (basis of record)
Praxillella praetermissa (Malmgren, 1865) (additional source)
Praxillella praetermissa minor Arwidsson, 1906 (original description)
Praxillura longissima Arwidsson, 1906 (original description)
Praxillura longissima minor Arwidsson, 1906 (original description)
Praxillura longissima paucimaculata Arwidsson, 1906 (original description)

Syntype museum not known, geounit Spitsbergen, identified as Nicomache (Loxochona) quadrispinata Arwidsson, 1906

 Authority

 for Maldaninae Malmgren, 1867

Malmgren (if indeed the author of Maldanidae) is deemed to have created Maldanidae at all family ranks including ... [details]

 Diagnosis

 for Lumbriclymeninae Arwidsson, 1906

No body-end plaques or posterior body collars. Single rows of uncini [details]

 Taxonomy

 for Nicomache (Loxochona) Arwidsson, 1906

Arwidsson (1906:104) separated his subgenus Loxochona from the nominal genus because of the slightly oblique ... [details]

 Type locality

 for Nicomache (Loxochona) quadrispinata Arwidsson, 1906

multiple localities offshore of Spitsbergen. One indicative station (first listed), 74.9167, 17.9833 350 m, is given [details]