Actinonema celtica Boucher, 1976 (additional source)
Actinonema pachydermatum Cobb, 1920 (additional source)
Adoncholaimus thalassophygas (de Man, 1876) Filipjev, 1918 (additional source)
Aegialoalaimus sabulicola Allgén, 1933 (basis of record)
Aegialoalaimus tenuicaudatus Allgén, 1932 (additional source)
Aglenchus agricola (de Man, 1884) Andrássy, 1954 (basis of record)
Alaimella cincta Cobb, 1920 (additional source)
Amphimonhystera anechma (Southern, 1914) Lorenzen, 1977 (additional source)
Anomonema deconincki Jensen, 1976 (basis of record)
Anoplostoma blanchardi de Man, 1888 accepted as Anoplostoma campbelli Allgén, 1932 (additional source)
Anticoma acuminata (Eberth, 1863) Bastian, 1865 (additional source)
Araeolaimus filipjevi Schuurmans Stekhoven & Adam, 1931 (additional source)
Axonolaimus helgolandicus Lorenzen, 1971 (additional source)
Axonolaimus orcombensis Warwick, 1970 (additional source)
Axonolaimus paraspinosus Schuurmans Stekhoven & Adam, 1931 (additional source)
Axonolaimus spinosus (Bütschli, 1874) de Man, 1889 (additional source)
Bathylaimus capacosus Hopper, 1962 (additional source)
Bathylaimus parafilicaudatus Allgén, 1935 accepted as Bathylaimus chesapeakensis Timm, 1952 (additional source)
Bathylaimus paralongisetosus Schuurmans Stekhoven & De Coninck, 1933 (additional source)
Bolbolaimus dentatus (Allgén, 1935) Jensen, 1978 accepted as Pseudomicrolaimus dentatus (Allgén, 1935) Sergeeva, 1976 op. Kovalyev & Tchesunov, 2005 (basis of record)
Bolbolaimus riemanni (Riemann, 1966) Jensen, 1978 (basis of record)
Bolbolaimus teutonicus (Riemann, 1966) Jensen, 1978 (basis of record)
Calomicrolaimus acanthus (Jayasree & Warwick, 1977) Jensen, 1978 accepted as Microlaimus acanthus (Jayasree & Warwick, 1977) Kovalyev & Tchesunov, 2005 (basis of record)
Calomicrolaimus honestus (de Man, 1922) Jensen, 1978 accepted as Microlaimus honestus De Man, 1922 (basis of record)
Calomicrolaimus marinus (Schulz, 1932) Coomans, 1989 accepted as Microlaimus marinus (Schulz, 1932) Schuurmans Stekhoven & De Coninck, 1933 (new combination reference)
Calomicrolaimus monstrosus (Gerlach, 1953) Vincx, 1981 accepted as Microlaimus monstrosus Gerlach, 1953 (basis of record)
Calomicrolaimus parahonestus (Gerlach, 1950) Jensen, 1978 accepted as Microlaimus parahonestus Gerlach, 1950 (basis of record)
Calomicrolaimus rugatus Lorenzen, 1976 (basis of record)
Camacolaimus longicauda de Man, 1922 accepted as Deontolaimus longicauda (de Man, 1922) Holovachov & Boström, 2015 (additional source)
Choniolaimus papillatus Ditlevsen, 1918 (additional source)
Chromadora kreisi Schuurmans Stekhoven & Adam, 1931 (additional source)
Chromadora macrolaima de Man, 1889 (additional source)
Chromadora nudicapitata Bastian, 1865 (additional source)
Chromadorella problematica Boucher, 1976 (basis of record)
Chromadorella salicaniensis Boucher, 1976 (basis of record)
Chromadorina germanica (Bütschli, 1874) Wieser, 1954 (additional source)
Chromadorina longisetosa (De Coninck & Schuurmans Stekhoven, 1933) Wieser, 1954 (additional source)
Chromadorita tentabunda de Man, 1880 accepted as Innocuonema tentabunda (de Man, 1890) Inglis, 1969 (basis of record)
Chromadorita tenuis (G. Schneider, 1906) Filipjev, 1922 (additional source)
Chromaspirina chabaudi Boucher, 1975 (basis of record)
Chromaspirina inglisi Warwick, 1970 (additional source)
Chromaspirina parapontica Luc & De Coninck, 1959 (additional source)
Chromaspirina pellita Gerlach, 1954 (additional source)
Cobbia trefusiaeformis de Man, 1907 (additional source)
Crenopharynx marioni (Southern, 1914) Filipjev, 1934 (additional source)
Cyartonema elegans Jayasree & Warwick, 1977 (additional source)
Cyartonema zosterae (Allgén, 1929) Juario, 1972 (additional source)
Cyatholaimus gracilis (Eberth, 1863) Bastian, 1865 (additional source)
Cylicolaimus magnus (Villot, 1875) de Man, 1889 (additional source)
Daptonema acrilabiatum (De Coninck & Schuurmans Stekhoven, 1933) Lorenzen, 1977 (additional source)
Daptonema calceolatum (De Coninck & Schuurmans Stekhoven, 1933) Lorenzen, 1977 (additional source)
Daptonema fistulatum (Wieser & Hopper, 1967) Lorenzen, 1977 (additional source)
Daptonema flagellicauda (Lorenzen, 1973) Lorenzen, 1977 (basis of record)
Daptonema groenlandicum (Ditlevsen, 1928) Lorenzen, 1977 (additional source)
Daptonema hirsutum (Vitiello, 1967) Lorenzen, 1977 (additional source)
Daptonema kornoeense (Allgén, 1929) Lorenzen, 1977 (additional source)
Daptonema longicaudatum (Filipjev, 1922) Lorenzen, 1977 (additional source)
Daptonema nanum (Lorenzen, 1971) Lorenzen, 1977 (additional source)
Daptonema normandicum (de Man, 1890) Lorenzen, 1977 (additional source)
Daptonema proprium (Lorenzen, 1972) Lorenzen, 1977 (additional source)
Daptonema riemanni (Platt, 1973) accepted as Paramonohystera riemanni (Platt, 1973) Lorenzen, 1977 (basis of record)
Daptonema setosum (Bütschli, 1874) Lorenzen, 1977 (additional source)
Daptonema stylosum (Lorenzen, 1973) Lorenzen, 1977 (basis of record)
Daptonema svalbardense (Gerlach, 1965) Lorenzen, 1977 (additional source)
Daptonema trabeculosum (Schneider, 1906) Lorenzen, 1977 (additional source)
Daptonema trichinus (Gerlach, 1956) (basis of record)
Daptonema xyaliforme (Wieser & Hopper, 1967) Lorenzen, 1977 (basis of record)
Dasynemoides albaensis (Warwick & Platt, 1973) Lorenzen, 1981 accepted as Dasynemella albaensis Warwick & Platt, 1973 accepted as Dasynemella riemanni (Haspeslagh, 1972) Tchesunov & Miljutina, 2002 (basis of record)
Desmodora communis (Bütschli, 1874) De Man, 1889 (additional source)
Desmodora pontica Filipjev, 1922 (additional source)
Desmodora schulzi Gerlach, 1950 accepted as Desmodorella schulzi (Gerlach, 1950) Verschelde et al., 1998 (basis of record)
Desmodora tenuispiculum Allgén, 1928 accepted as Desmodorella tenuispiculum (Allgén, 1928) Gerlach, 1963 (additional source)
Desmolaimus zeelandicus de Man, 1880 (additional source)
Desmoscolex frontalis Gerlach, 1952 represented as Desmoscolex (Desmolorenzenia) frontalis Gerlach, 1952 (basis of record)
Desmoscolex longisetosus Timm, 1970 accepted as Desmoscolex (Desmoscolex) longisetosus Timm, 1970 (additional source)
Dichromadora cephalata (Steiner, 1916) Kreis, 1929 (additional source)
Dichromadora cucullata Lorenzen, 1973 (additional source)
Dichromadora hyalocheile De Coninck & Schuurmans Stekhoven, 1933 (additional source)
Diplolaimella dievengatensis Jacobs, Van de Velde, Geraert & Vranken, 1990 (basis of record)
Diplolaimella ocellata (Bütschli, 1874) (additional source)
Dracognomus tinae Jensen, 1981 (basis of record)
Echinotheristus teutonicus Thun & Riemann, 1967 (additional source)
Eleutherolaimus amasi Bouwman, 1981 (basis of record)
Eleutherolaimus iniquisetosus Schuurmans Stekhoven, 1935 (additional source)
Enoploides labiatus (Bütschli, 1874) Filipjev, 1918 (additional source)
Enoploides spiculohamatus Schulz, 1932 (additional source)
Enoploides tyrrhenicus Brunetti, 1949 (additional source)
Enoplolaimus conicollis Gerlach, 1952 (additional source)
Enoplolaimus longicaudatus (Southern, 1914) Filipjev, 1921 (additional source)
Enoplolaimus subterraneus Gerlach, 1953 (additional source)
Enoplolaimus zosterae Schulz, 1932 (additional source)
Enoplus communis Bastian, 1865 (additional source)
Epsilonema pustulatum (Gerlach, 1952) (basis of record)
Epsilonema serrulatum Lorenzen, 1973 (basis of record)
Eucephalobus Steiner, 1936 (basis of record)
Eucephalobus oxyuroides (de Man, 1876) Steiner, 1936 (basis of record)
Gammanema conicauda Gerlach, 1953 (additional source)
Gammanema rapax (Ssaweljev, 1912) Gerlach, 1964 (additional source)
Geomonhystera disjuncta (Bastian, 1865) accepted as Halomonhystera disjuncta (Bastian, 1865) Andrássy, 2006 (basis of record)
Gonionchus cumbraensis Benwell, 1981 (additional source)