Amphimonhystera anechma (Southern, 1914) Lorenzen, 1977 (additional source)
Anomonema deconincki Jensen, 1976 (additional source)
Anticoma acuminata (Eberth, 1863) Bastian, 1865 (additional source)
Ascolaimus elongatus (Bütschli, 1874) Shuurmans Stekhoven & de Coninck, 1932 (additional source)
Axonolaimus helgolandicus Lorenzen, 1971 (additional source)
Axonolaimus orcombensis Warwick, 1970 (additional source)
Bathylaimus capacosus Hopper, 1962 (additional source)
Bathylaimus parafilicaudatus Allgén, 1935 accepted as Bathylaimus chesapeakensis Timm, 1952 (additional source)
Belbolla asupplementata (Juario, 1974) Andrássy, 1973 (additional source)
Bolbolaimus dentatus (Allgén, 1935) Jensen, 1978 accepted as Pseudomicrolaimus dentatus (Allgén, 1935) Sergeeva, 1976 op. Kovalyev & Tchesunov, 2005 (additional source)
Bolbolaimus riemanni (Riemann, 1966) Jensen, 1978 (additional source)
Bolbolaimus teutonicus (Riemann, 1966) Jensen, 1978 (additional source)
Calomicrolaimus acanthus (Jayasree & Warwick, 1977) Jensen, 1978 accepted as Microlaimus acanthus (Jayasree & Warwick, 1977) Kovalyev & Tchesunov, 2005 (additional source)
Calomicrolaimus honestus (de Man, 1922) Jensen, 1978 accepted as Microlaimus honestus De Man, 1922 (additional source)
Calomicrolaimus parahonestus (Gerlach, 1950) Jensen, 1978 accepted as Microlaimus parahonestus Gerlach, 1950 (additional source)
Calomicrolaimus spirifer (Warwick, 1970) Jensen, 1978 accepted as Microlaimus spirifer Warwick, 1970 accepted as Molgolaimus spirifer (Warwick, 1970) Shi & Xu, 2017 (additional source)
Calyptronema maxweberi (de Man, 1922) (additional source)
Camacolaimus longicauda de Man, 1922 accepted as Deontolaimus longicauda (de Man, 1922) Holovachov & Boström, 2015 (additional source)
Ceramonema yunfengi Platt & Zhang, 1982 (additional source)
Chitwoodia tripapillata Jayasree, 1976 (additional source)
Choniolaimus panicus Gerlach, 1956 (additional source)
Chromadorina germanica (Bütschli, 1874) Wieser, 1954 (additional source)
Chromaspirina parapontica Luc & De Coninck, 1959 (additional source)
Chromaspirina pellita Gerlach, 1954 (additional source)
Cobbia trefusiaeformis de Man, 1907 (additional source)
Coninckia macrospirifera Zhang, 1983 (additional source)
Cyartonema elegans Jayasree & Warwick, 1977 (additional source)
Cyartonema germanicum Juario, 1972 (additional source)
Daptonema fallax (Lorenzen, 1972) 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 (additional source)
Daptonema setifer (Gerlach, 1952) Lorenzen, 1977 (additional source)
Daptonema stylosum (Lorenzen, 1973) Lorenzen, 1977 (additional source)
Daptonema tenuispiculum (Ditlevsen, 1918) Lorenzen, 1977 (additional source)
Daptonema xyaliforme (Wieser & Hopper, 1967) Lorenzen, 1977 (additional source)
Desmodora tenuispiculum Allgén, 1928 accepted as Desmodorella tenuispiculum (Allgén, 1928) Gerlach, 1963 (additional source)
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)
Dichromadora scandula Lorenzen, 1966 (additional source)
Diplopeltula ostrita Boucher & Helléouet, 1977 (additional source)
Dracognomus tinae Jensen, 1981 (additional source)
Enoploides delamarei Boucher, 1977 (additional source)
Enoploides spiculohamatus Schulz, 1932 (additional source)
Enoplolaimus conicollis Gerlach, 1952 (additional source)
Enoplolaimus denticulatus Warwick, 1970 (additional source)
Enoplolaimus longicaudatus (Southern, 1914) Filipjev, 1921 (additional source)
Filitonchus filiformis (Warwick, 1971) Platt, 1982 (additional source)
Gonionchus cumbraensis Benwell, 1981 (additional source)
Gonionchus heipi Vincx, 1986 (additional source)
Gonionchus inaequalis Warwick & Platt, 1973 (additional source)
Gonionchus longicaudatus (Ward, 1972) Lorenzen, 1977 (additional source)
Halalaimus de Man, 1888 (additional source)
Halalaimus curvicaudatus Juario, 1974 (additional source)
Halichoanolaimus robustus (Bastian, 1865) de Man, 1886 (additional source)
Ixonema sordidum Lorenzen, 1971 (additional source)
Latronema orcinum (Gerlach, 1952) Wieser, 1954 (additional source)
Leptolaimus ampullaceus Warwick, 1970 (additional source)
Leptolaimus elegans (Stekhoven & De Coninck, 1933) Gerlach, 1958 (additional source)
Leptolaimus venustus Lorenzen, 1972 (additional source)
Linhomoeus Bastian, 1865 (additional source)
Mesacanthion diplechma (Southern, 1914) Filipjev, 1927 (additional source)
Mesacanthion hirsutum Gerlach, 1953 (additional source)
Metadesmolaimus aduncus Lorenzen, 1972 (additional source)
Metadesmolaimus gelana (Warwick & Platt, 1973) Lorenzen, 1977 (additional source)
Metadesmolaimus pandus Lorenzen, 1971 (additional source)
Metalinhomoeus de Man, 1907 (additional source)
Metepsilonema emersum Lorenzen, 1973 (additional source)
Metepsilonema hagmeieri (Stauffer, 1924) (additional source)
Microlaimus acinaces Warwick & Platt, 1973 (additional source)
Microlaimus conothelis (Lorenzen, 1973) Jensen, 1978 (additional source)
Microlaimus conspicuus Lorenzen, 1973 accepted as Microlaimus monstrosus Gerlach, 1953 (additional source)
Microlaimus marinus (Schulz, 1932) Schuurmans Stekhoven & De Coninck, 1933 (additional source)
Microlaimus ostracion Schuurmans Stekhoven, 1935 (additional source)
Monhystera pusilla Boucher & Helléouet, 1977 accepted as Thalassomonhystera pusilla (Boucher & Helléouet, 1977) Jacobs, 1987 (additional source)
Monoposthia mirabilis Schulz, 1932 (additional source)
Nannolaimus fusus Gerlach, 1956 (additional source)
Neochromadora angelica Riemann, 1976 (additional source)
Neochromadora munita Lorenzen, 1971 (additional source)
Neochromadora poecilosoma (de Man, 1893) Micoletzky, 1924 (additional source)
Neochromadora trichophora (Steiner, 1921) Gerlach, 1951 (additional source)
Odontophora exharena Warwick & Platt, 1973 (additional source)
Odontophora phalarata Lorenzen, 1971 (additional source)
Odontophora rectangula Lorenzen, 1971 (additional source)
Odontophoroides paramonhystera Lambshead, 1982 (additional source)
Onyx perfectus Cobb, 1891 (additional source)
Oxyonchus dentatus (Ditlevsen, 1918) Filipjev, 1927 (additional source)
Paracanthonchus thaumasius (Schulz, 1932) Vincx et al., 1982 (additional source)
Paracyatholaimoides asymmetricus Boucher, 1976 (additional source)
Paracyatholaimoides labiosetosus Riemann, 1966 (additional source)
Paracyatholaimoides multispiralis Gerlach, 1953 (additional source)
Paracyatholaimus occultus Gerlach, 1956 (additional source)
Paracyatholaimus pentodon Riemann, 1966 (additional source)
Paramesonchium belgicum Jensen, 1976 (additional source)
Pareurystomina acuminata (de Man, 1889) Gerlach, 1952 (additional source)
Perepsilonema crassum Lorenzen, 1973 (additional source)
Pomponema debile Lorenzen, 1972 (additional source)