Adoncholaimus derjugini (Ssaweljev, 1912) (additional source)
Anoplostoma viviparum (Bastian, 1865) Bütschli, 1874 (additional source)
Anticoma longicaudata Kreis, 1928 (additional source)
Araeolaimus elegans de Man, 1888 (additional source)
Araeolaimus macrocirculus Kreis, 1928 (additional source)
Axonolaimus spinosus (Bütschli, 1874) de Man, 1889 (additional source)
Bathylaimus inermis (Ditlevsen, 1918) De Man, 1922 (additional source)
Bathylaimus longicaudatus Filipjev, 1946 (additional source)
Bathylaimus septentrionalis (Filipjev, 1927) De Coninck & Stekhoven, 1933 (additional source)
Camacolaimus tardus de Man, 1889 accepted as Deontolaimus tardus (de Man, 1889) Holovachov & Boström, 2015 (additional source)
Chaetonema longisetum (Steiner, 1916) Filipjev, 1927 (additional source)
Deontostoma arcticum (Ssaweljev, 1912) Filipjev, 1916 (additional source)
Desmodora pilosa Ditlevsen, 1926 (additional source)
Dichromadora cephalata (Steiner, 1916) Kreis, 1929 (additional source)
Ditlevsenella murmanica Filipjev, 1927 (additional source)
Dolicholaimus marioni De Man, 1888 (additional source)
Draconema cephalatum (Cobb, 1913) Steiner, 1921 (additional source)
Enoplolaimus vulgaris de Man, 1893 (additional source)
Enoplus alatus Ssaweljev, 1912 (ecology source)
Enoplus behringicus Filipjev, 1916 (additional source)
Enoplus communis Bastian, 1865 (additional source)
Enoplus crassus Filipjev, 1916 (additional source)
Enoplus polaris Filipjev, 1946 (additional source)
Euchromadora arctica Filipjev, 1946 accepted as Graphonema arctica (Filipjev, 1946) Warwick & Coles, 1975 (additional source)
Fenestrolaimus murmanicus Filipjev, 1927 (additional source)
Fenestrolaimus profundis Filipjev, 1927 (additional source)
Filipjevia macrolabiata Kreis, 1928 (additional source)
Fusonema multilabiatum Kreis, 1928 (additional source)
Halalaimus diplocephalus Filipjev, 1927 (additional source)
Halalaimus isaitshikovi (Filipjev, 1927) Schuurmans Stekhoven, 1935 (additional source)
Halichoanolaimus robustus (Bastian, 1865) de Man, 1886 (additional source)
Ledovitia hirsuta Filipjev, 1927 (additional source)
Leptosomatum elongatum Bastian, 1865 accepted as Leptosomatum gracile Bastian, 1865 (additional source)
Leptosomatum gracile Bastian, 1865 (additional source)
Leptosomella acrocerca Filipjev, 1927 (additional source)
Metachromadora vivipara (de Man, 1907) Allgen, 1928 accepted as Chromadoropsis vivipara (de Man, 1907) Allgen, 1928 (additional source)
Monoposthia costata (Bastian, 1865) de Man, 1889 (additional source)
Nemanema rotundicaudatum (Ditlevsen, 1926) Filipjev, 1946 (additional source)
Neochromadora craspedota (Steiner, 1916) Micoletzky, 1924 (additional source)
Neochromadora poecilosoma (de Man, 1893) Micoletzky, 1924 (additional source)
Oncholaimus brachycercus de Man, 1889 (additional source)
Oncholaimus ceterus Filipjev, 1946 (additional source)
Oncholaimus plavmornini Filipjev, 1927 (additional source)
Oxyonchus dentatus (Ditlevsen, 1918) Filipjev, 1927 (additional source)
Oxyonchus problematicus Filipjev, 1946 (additional source)
Paracanthonchus bipapillatus Kreis, 1928 (additional source)
Paracanthonchus elongatus (de Man, 1907) Micoletzky, 1924 (additional source)
Paracanthonchus macrodon (Ditlevsen, 1918) Micoletzky, 1924 (additional source)
Paralinhomoeus lepturus de Man, 1907 (additional source)
Parasphaerolaimus paradoxus Ditlevsen, 1918 (additional source)
Pelagonema tenue Kreis, 1928 (additional source)
Phanodermopsis conicauda Filipjev, 1946 (additional source)
Pontonema vulgare (Bastian, 1865) Filipjev, 1916 (additional source)
Pseudocella elegans (Ditlevsen, 1926) Wieser, 1953 (additional source)
Rhabdodemania gracilis (Ditlevsen, 1918) Baylis & Daubney, 1926 (additional source)
Rhabdodemania minor (Southern, 1914) Baylis & Daubney, 1926 (additional source)
Richtersia collaris Steiner, 1916 (additional source)
Saveljevia kolaensis Filipjev, 1927 (additional source)
Sphaerolaimus islandicus Ditlevsen, 1926 accepted as Parasphaerolaimus islandicus (Ditlevsen, 1926) Filipjev, 1946 (additional source)
Synonchus murmanicus Filipjev, 1927 (additional source)
Thalassoalaimus egregius Steiner, 1916 accepted as Litinium egregius (Steiner, 1916) Martelli, Lo Russo, Villares & Pastor de Ward, 2017 (additional source)
Thalassoalaimus septentrionalis Filipjev, 1927 (additional source)
Theristus acer Bastian, 1865 (additional source)
Thoracostomopsis ditlevseni Filipjev, 1927 accepted as Metaphanoderma ditlevseni (Filipjev, 1927) Platonova, 1984 (additional source)
Tripyloides marinus (Bütschli, 1874) de Man, 1886 (additional source)
Vasculonema conicaudatum Kreis, 1928 (additional source)
Viscosia stenolaima Filipjev, 1927 (additional source)