Acanthonchus viviparus Cobb, 1920 accepted as Acanthonchus (Acanthonchus) viviparus Cobb, 1920 (additional source)
Adoncholaimus thalassophygas (de Man, 1876) Filipjev, 1918 (additional source)
Aegialoalaimus elegans de Man, 1907 (additional source)
Amphimonhystera anechma (Southern, 1914) Lorenzen, 1977 (additional source)
Anoplostoma viviparum (Bastian, 1865) Bütschli, 1874 (additional source)
Anticoma arctica Steiner, 1916 (additional source)
Araeolaimus elegans de Man, 1888 (additional source)
Araeolaimus longicauda Allgén, 1929 (additional source)
Araeolaimus steineri (Steiner, 1916) Filipjev, 1922 (additional source)
Axonolaimus spinosus (Bütschli, 1874) de Man, 1889 (additional source)
Bathylaimus inermis (Ditlevsen, 1918) De Man, 1922 (additional source)
Bathylaimus zostericola (Allgén, 1933) De Coninck & Stekhoven, 1933 (additional source)
Chloronemella filiformis Allgén, 1929 (additional source)
Chromadora macrolaima de Man, 1889 (additional source)
Chromadora nudicapitata Bastian, 1865 (additional source)
Chromadorella filiformis (Bastian, 1865) Filipjev, 1918 (additional source)
Cobbia simplex Allgén, 1929 (additional source)
Cyatholaimus gracilis (Eberth, 1863) Bastian, 1865 (additional source)
Cyatholaimus simulatus Kreis, 1924 (additional source)
Cylicolaimus magnus (Villot, 1875) de Man, 1889 (additional source)
Desmodora communis (Bütschli, 1874) De Man, 1889 (additional source)
Desmodora microchaeta Allgén, 1929 (additional source)
Desmodora polychaeta Allgén, 1929 (additional source)
Desmolaimus zeelandicus de Man, 1880 (additional source)
Diplopeltis cirrhatus (Eberth, 1863) Cobb, 1891 (additional source)
Diplopeltis incisus Southern, 1914 accepted as Diplopeltula incisa (Southern, 1914) Gerlach, 1962 accepted as Neodiplopeltula incisa (Southern, 1914) Holovachov & Boström, 2018 (additional source)
Enoplus brevis Bastian, 1865 (additional source)
Enoplus communis Bastian, 1865 (additional source)
Euchromadora vulgaris (Bastian, 1865) de Man, 1886 (additional source)
Halaphanolaimus longisetosus Allgén, 1928 (additional source)
Halaphanolaimus pellucidus Southern, 1914 accepted as Leptolaimus pellucidus (Southern, 1914) Holovachov & Boström, 2013 (additional source)
Halichoanolaimus robustus (Bastian, 1865) de Man, 1886 (additional source)
Hypodontolaimus inaequalis (Bastian, 1865) De Man, 1886 (additional source)
Klugea filiformis (Allgén, 1929) Filipjev, 1934 (taxonomy source)
Krampia opaca (Allgén, 1930) Schuurmans Stekhoven in Kreis, 1934 (additional source)
Linhomoeus elongatus Bastian, 1865 (additional source)
Linhomoeus hirsutus Bastian, 1865 (additional source)
Metachromadora vivipara (de Man, 1907) Allgen, 1928 accepted as Chromadoropsis vivipara (de Man, 1907) Allgen, 1928 (additional source)
Metalinhomoeus filiformis (de Man, 1907) accepted as Desmolaimus brasiliensis Gerlach, 1963 (additional source)
Metoncholaimus albidus (Bastian, 1865) Filipjev, 1918 (additional source)
Monhystera disjuncta Bastian, 1865 accepted as Halomonhystera disjuncta (Bastian, 1865) Andrássy, 2006 (additional source)
Monhystera filicaudata Allgén, 1929 (additional source)
Monhystera longicapitata Filipjev, 1922 accepted as Thalassomonhystera longicapitata (Filipjev, 1922) (additional source)
Monhystera parva (Bastian, 1865) Butschli, 1874 accepted as Thalassomonhystera parva (Bastian, 1865) Jacobs, 1987 (additional source)
Monhystera rotundicapitata Filipjev, 1922 accepted as Thalassomonhystera rotundicapitata (Filipjev, 1922) Jacobs, 1987 accepted as Halomonhystera rotundicapitata (Filipjev, 1922) Tchesunov, Portnova & van Campenhout, 2015 (additional source)
Monhystera sabulicola Allgén, 1929 accepted as Thalassomonhystera sabulicola (Allgén, 1929) (additional source)
Monoposthia costata (Bastian, 1865) de Man, 1889 (additional source)
Neochromadora craspedota (Steiner, 1916) Micoletzky, 1924 (additional source)
Neochromadora poecilosoma (de Man, 1893) Micoletzky, 1924 (additional source)
Odontophora armata (Ditlevsen, 1918) Allgén, 1929 (additional source)
Odontophora longisetosa (Allgén, 1928) (additional source)
Odontophora parasetosa (Allgén, 1929) (additional source)
Oncholaimellus calvadosicus de Man, 1890 (additional source)
Oncholaimus viridis Bastian, 1865 (additional source)
Oxyonchus dentatus (Ditlevsen, 1918) Filipjev, 1927 (additional source)
Paracanthonchus elongatus (de Man, 1907) Micoletzky, 1924 (additional source)
Paracyatholaimus dubiosus (Bütschli, 1874) Micoletzky, 1922 (additional source)
Paralinhomoeus intermedius (Allgén, 1929) Wieser, 1956 accepted as Linhomoeus intermedius Allgen, 1929 (additional source)
Paralinhomoeus lepturus de Man, 1907 (additional source)
Paralinhomoeus viscosus (Allgén, 1929) Allgén, 1934 accepted as Linhomoeus viscosus Allgen, 1929 (additional source)
Paramonhystera megacephala Wieser, 1956 accepted as Paramonohystera megacephala Steiner, 1916 (additional source)
Pelagonema propinqua Allgén, 1929 (additional source)
Pontonema vulgare (Bastian, 1865) Filipjev, 1916 (additional source)
Rhabdodemania minor (Southern, 1914) Baylis & Daubney, 1926 (additional source)
Sabatieria longiseta Steiner, 1916 accepted as Sabatieria celtica Southern, 1914 (additional source)
Sphaerolaimus hirsutus Bastian, 1865 (additional source)
Spilophorella paradoxa (de Man, 1888) Filipjev, 1917 (additional source)
Symplocostoma tenuicolle (Eberth, 1863) Wieser, 1953 (additional source)
Terschellingia longicaudata de Man, 1907 (additional source)
Thalassoalaimus septentrionalis Filipjev, 1927 (additional source)
Theristus acer Bastian, 1865 (additional source)
Theristus velox Bastian, 1865 (additional source)
Thoracostoma coronatum (Eberth, 1863) Marion, 1870 (additional source)
Tricoma suecica Allgén, 1930 accepted as Tricoma (Quadricoma) suecica (Allgén, 1930) (additional source)
Tripyloides marinus (Bütschli, 1874) de Man, 1886 (additional source)
Viscosia glabra (Bastian, 1865) de Man, 1890 (additional source)
Viscosia langrunensis (de Man, 1890) (additional source)
Viscosia viscosa (Bastian, 1865) de Man, 1890 (additional source)