Acantholaimus longisetosus Allgén, 1933 (additional source)
Actinonema celtica Boucher, 1976 (additional source)
Actinonema pachydermatum Cobb, 1920 (taxonomy source)
Adoncholaimus fuscus (Bastian, 1865) Filipjev, 1918 (additional source)
Adoncholaimus lepidus (de Man, 1889) Filipjev, 1918 (additional source)
Adoncholaimus panicus Cobb, 1930 (additional source)
Adoncholaimus thalassophygas (de Man, 1876) Filipjev, 1918 (additional source)
Aegialoalaimus cylindricauda Allgén, 1933 (additional source)
Aegialoalaimus elegans de Man, 1907 (additional source)
Aegialoalaimus sabulicola Allgén, 1933 (additional source)
Aegialoalaimus setosa Bouwman, 1981 (additional source)
Alaimella truncata Cobb, 1920 (additional source)
Amphimonhystera anechma (Southern, 1914) Lorenzen, 1977 (additional source)
Amphimonhystera helgolandica Riemann, 1967 accepted as Ammotheristus helgolandicus (Riemann, 1967) Lorenzen, 1977 (additional source)
Amphimonhystera subtilis Lorenzen, 1972 accepted as Ammotheristus subtilis (Lorenzen, 1972) Lorenzen, 1977 (additional source)
Anaplectus magnus Brzeski, 1963 (additional source)
Anomonema deconincki Jensen, 1976 (additional source)
Anoplostoma blanchardi de Man, 1888 accepted as Anoplostoma campbelli Allgén, 1932 (additional source)
Anoplostoma exceptum Schulz, 1935 (additional source)
Anoplostoma viviparum (Bastian, 1865) Bütschli, 1874 (additional source)
Anticoma acuminata (Eberth, 1863) Bastian, 1865 (taxonomy source)
Anticoma eberthi Bastian, 1865 (additional source)
Anticoma pellucida Bastian, 1865 accepted as Anticoma limalis novozemelica Filipjev, 1927 accepted as Anticoma acuminata (Eberth, 1863) Bastian, 1865 (additional source)
Anticyathus primitivus (Allgén, 1933) Gerlach, 1963 (additional source)
Antomicron elegans (de Man, 1922) De Coninck, 1965 (additional source)
Antomicron pellucidum Cobb, 1920 (additional source)
Antomicron pratense Lorenzen, 1966 (additional source)
Araeolaimus elegans de Man, 1888 (additional source)
Araeolaimus filipjevi Schuurmans Stekhoven & Adam, 1931 (additional source)
Araeolaimus leptopharynx (Bresslau & Stekhoven in Stekhoven, 1935) Wieser, 1956 (additional source)
Araeolaimus longicauda Allgén, 1929 (additional source)
Araeolaimus microphthalmus (de Man, 1893) Filipjev, 1918 accepted as Araeolaimoides microphthalmus de Man, 1893 (additional source)
Araeolaimus oxystomaeoides Allgén, 1939 (additional source)
Araeolaimus penelope Moore, 1977 (additional source)
Araeolaimus propinquus Allgén, 1947 (additional source)
Araeolaimus steineri (Steiner, 1916) Filipjev, 1922 (additional source)
Ascolaimus elongatus (Bütschli, 1874) Shuurmans Stekhoven & de Coninck, 1932 (additional source)
Atrochromadora microlaima (de Man, 1889) Wieser, 1954 (additional source)
Axonolaimus demani De Coninck & Schuurmans Stekhoven, 1933 (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)
Axonolaimus typicus de Man, 1922 (additional source)
Axonolaimus villosus Skwarra, 1922 (additional source)
Bathylaimus australis Cobb, 1894 (additional source)
Bathylaimus capacosus Hopper, 1962 (additional source)
Bathylaimus filicaudatus (Schuurmans Stekhoven & Adam, 1931) De Coninck & Schuurmans Stekhoven, 1933 (additional source)
Bathylaimus inermis (Ditlevsen, 1918) De Man, 1922 (additional source)
Bathylaimus longisetosus (Allgén, 1929) De Coninck & Schuurmans Stekhoven, 1933 (additional source)
Bathylaimus macramphis Schuurmans Stekhoven & De Coninck, 1933 (additional source)
Bathylaimus parafilicaudatus Allgén, 1935 accepted as Bathylaimus chesapeakensis Timm, 1952 (additional source)
Bathylaimus paralongisetosus Schuurmans Stekhoven & De Coninck, 1933 (additional source)
Bathylaimus stenolaimus Schuurmans-Stekhoven & De Coninck, 1933 (additional source)
Bathylaimus zostericola (Allgén, 1933) De Coninck & Stekhoven, 1933 (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)
Calligyrus gerlachi Lorenzen, 1969 (additional source)
Calomicrolaimus acanthus (Jayasree & Warwick, 1977) Jensen, 1978 accepted as Microlaimus acanthus (Jayasree & Warwick, 1977) Kovalyev & Tchesunov, 2005 (additional source)
Calomicrolaimus arenarius Blome, 1982 accepted as Microlaimus arenarius (Blome, 1982) Kovalyev & Miljutina, 2009 (additional source)
Calomicrolaimus honestus (de Man, 1922) Jensen, 1978 accepted as Microlaimus honestus De Man, 1922 (additional source)
Calomicrolaimus monstrosus (Gerlach, 1953) Vincx, 1981 accepted as Microlaimus monstrosus Gerlach, 1953 (additional source)
Calomicrolaimus parahonestus (Gerlach, 1950) Jensen, 1978 accepted as Microlaimus parahonestus Gerlach, 1950 (additional source)
Calomicrolaimus rugatus Lorenzen, 1976 (additional source)
Calomicrolaimus tenuicollis (Gerlach, 1952) Jensen, 1978 accepted as Microlaimus tenuicollis Gerlach, 1952 (additional source)
Calyptronema maxweberi (de Man, 1922) (additional source)
Camacolaimoides praedator (de Man, 1922) De Coninck & Schuurmans Stekhoven, 1933 accepted as Deontolaimus praedator (de Man, 1922) Holovachov & Boström, 2015 (additional source)
Camacolaimus brachyuris Allgén, 1933 (additional source)
Camacolaimus exilis (Cobb, 1920) Wieser, 1956 accepted as Deontolaimus exilis (Cobb, 1920) Holovachov & Boström, 2015 (additional source)
Camacolaimus longicauda de Man, 1922 accepted as Deontolaimus longicauda (de Man, 1922) Holovachov & Boström, 2015 (additional source)
Camacolaimus norwegicus Allgén, 1933 (additional source)
Camacolaimus tardus de Man, 1889 accepted as Deontolaimus tardus (de Man, 1889) Holovachov & Boström, 2015 (additional source)
Camacolaimus tenuicaudatus Allgén, 1933 (additional source)
Camacolaimus trituberculatus Blome, 1982 accepted as Deontolaimus trituberculatus (Blome, 1982) Holovachov & Boström, 2015 (additional source)
Campylaimus gerlachi Timm, 1961 (additional source)
Campylaimus inaequalis Cobb, 1920 (additional source)
Campylaimus minor Timm, 1961 (additional source)
Campylaimus mirus Gerlach, 1950 (additional source)
Catanema smo Platt & Zhang, 1982 accepted as Robbea smo (Platt & Zhang, 1982) Tchesunov, 2013 (additional source)
Ceramonema yunfengi Platt & Zhang, 1982 (additional source)
Chaetonema canellatum Gerlach, 1956 (additional source)
Choanolaimus psammophilus de Man, 1880 (additional source)
Choniolaimus panicus Gerlach, 1956 (additional source)
Choniolaimus papillatus Ditlevsen, 1918 (additional source)
Chromadora axi Gerlach, 1951 (additional source)
Chromadora bergensis Allgén, 1932 accepted as Chromadora macrolaima bergensis Allgén, 1932 accepted as Chromadorina bergensis (Allgén, 1932) Wieser, 1954 (additional source)
Chromadora buesumensis Kreis, 1924 (additional source)
Chromadora germanica Bütschli, 1874 accepted as Chromadorina germanica (Bütschli, 1874) Wieser, 1954 (additional source)
Chromadora kreisi Schuurmans Stekhoven & Adam, 1931 (additional source)
Chromadora macrolaima de Man, 1889 (additional source)
Chromadora nudicapitata hentscheli Micoletzky, 1922 accepted as Chromadora hentscheli (Micoletzky, 1922) Micoletzky, 1924 (additional source)
Chromadorella filiformis (Bastian, 1865) Filipjev, 1918 (additional source)
Chromadorella filiformis membranata Micoletzky, 1922 accepted as Chromadorella membranata (Micoletzky, 1922) Micoletzky, 1924 (additional source)
Chromadorella salicaniensis Boucher, 1976 (additional source)
Chromadorina armata (Allgén, 1933) Wieser, 1954 (additional source)
Chromadorina bergensis (Allgén, 1932) Wieser, 1954 (additional source)
Chromadorina cervix (Wieser, 1951) Wieser, 1954 (additional source)
Chromadorina germanica (Bütschli, 1874) Wieser, 1954 (additional source)