Acanthomysis nephrophthalma Banner, 1948 accepted as Pacifacanthomysis nephrophthalma (Banner, 1948) (basis of record)
Acanthopharyngoides Chitwood, 1936 (additional source)
Acanthopharyngoides quintus Riemann & Schrage, 1977 (basis of record)
Actinonema Cobb, 1920 (additional source)
Actinonema fidatum Vitiello, 1970 (additional source)
Actinonema grafi Jensen, 1991 (basis of record)
Actinonema longicaudatum (Steiner, 1918) Wieser, 1954 (additional source)
Adoncholaiminae Gerlach & Riemann, 1974 (additional source)
Aegialoalaimidae Lorenzen, 1981 (additional source)
Aegialoalaimus de Man, 1907 (additional source)
Aegialoalaimus elegans de Man, 1907 (additional source)
Amphimonhystera Allgén, 1929 (additional source)
Anoplostoma Bütschli, 1874 (additional source)
Anoplostomatidae Gerlach & Riemann, 1974 (additional source)
Anoplostomatinae (additional source)
Antarcticonema Timm, 1978 (additional source)
Antarcticonema comicapitatum Timm, 1978 (basis of record)
Anticoma Bastian, 1865 (additional source)
Anticoma acuminata (Eberth, 1863) Bastian, 1865 (additional source)
Anticoma antarctica (Allgén, 1929) Cobb, 1891 (basis of record)
Anticomidae Filipjev, 1918 (additional source)
Anticyathus Cobb, 1920 (additional source)
Anticyclus Cobb, 1920 (additional source)
Anticyclus gigas Vitiello, 1969 (additional source)
Antomicron Cobb, 1920 (additional source)
Aponema Jensen, 1978 (additional source)
Aponema nympha Bussau, 1993 accepted as Microlaimus nympha (Bussau & Vopel, 1999) Tchesunov, 2014 (basis of record)
Atrochromadora Wieser, 1959 (additional source)
Atrochromadora microlaima (de Man, 1889) Wieser, 1954 (additional source)
Axonolaimidae Filipjev, 1918 (additional source)
Axonolaimoidea Filipjev, 1918 (additional source)
Axonolaimus de Man, 1889 (additional source)
Bathyepsilonema Steiner, 1927 (additional source)
Bathyeurystomina rockallensis Lambshead & Platt, 1979 (basis of record)
Bathyeurystomina valeriae Lambshead & Platt, 1979 (basis of record)
Bathylaimus Cobb, 1894 (additional source)
Bathynox clavata (Bussau, 1993) Bussau & Vopel, 1999 (basis of record)
Bodonema vossi Jensen, 1991 (basis of record)
Bolbolaimus Cobb, 1920 (additional source)
Boreomysis (Boreomysis) sphaerops Ii, 1964 (basis of record)
Calligyrus Lorenzen, 1969 (additional source)
Calomicrolaimus Lorenzen, 1976 (additional source)
Calyptronema Marion, 1870 (additional source)
Camacolaiminae Micoletzky, 1924 (additional source)
Camacolaimus prytherchi Chitwood, 1935 accepted as Deontolaimus prytherchi (Chitwood, 1935) Holovachov & Boström, 2015 (additional source)
Camacolaimus tardus de Man, 1889 accepted as Deontolaimus tardus (de Man, 1889) Holovachov & Boström, 2015 (additional source)
Campylaimus Cobb, 1920 (additional source)
Campylaimus gerlachi Timm, 1961 (additional source)
Campylaimus inaequalis Cobb, 1920 (additional source)
Ceramonema Cobb, 1920 (additional source)
Ceramonema chitwoodi De Coninck, 1942 (additional source)
Ceramonema reticulatum Chitwood, 1936 (additional source)
Ceramonema sculpturatum Chitwood, 1936 (basis of record)
Ceramonematidae Cobb, 1933 (additional source)
Cervonema Wieser, 1954 (additional source)
Cervonema brevicauda Gourbault, 1980 (basis of record)
Cervonema chilensis Chen & Vincx, 2000 (basis of record)
Cervonema jenseni Gourbault, 1980 (basis of record)
Cervonema tenuicaudatum (Schuurmans Stekhoven, 1950) Wieser, 1954 (basis of record)
Chaetonema Filipjev, 1927 (additional source)
Chaetonematinae Gerlach & Riemann, 1974 (additional source)
Cheironchus Cobb, 1917 (additional source)
Choanolaimus de Man, 1880 (additional source)
Chromadora Bastian, 1865 (additional source)
Chromadoridae Filipjev, 1917 (additional source)
Chromadorina (additional source)
Chromadorina Filipjev, 1918 (additional source)
Chromadorinae Filipjev, 1917 (additional source)
Chromadorita Filipjev, 1922 (additional source)
Chromadorita ceratoserolis Lorenzen, 1986 (basis of record)
Chromadorita mucrodonta (Steiner, 1916) Wieser, 1954 (additional source)
Chromadoroidea Filipjev, 1917 (additional source)
Cobbia de Man, 1907 (additional source)
Cobbionema Filipjev, 1922 (additional source)
Comesoma Bastian, 1865 (additional source)
Comesoma hermani Chen & Vincx, 1998 (basis of record)
Comesomatidae Filipjev, 1918 (additional source)
Comesomatinae Filipjev, 1918 (additional source)
Comesomoides deconincki Gourbault, 1980 (basis of record)
Coninckia Gerlach, 1956 (additional source)
Crenopharynginae Platonova, 1976 (additional source)
Crenopharynx Filipjev, 1934 (additional source)
Crenopharynx marioni (Southern, 1914) Filipjev, 1934 (additional source)
Cricolaimus Southern, 1914 (additional source)
Curvolaimus Wieser, 1953 (additional source)
Curvolaimus uteratus Vitiello, 1970 (additional source)
Cyartonema Cobb, 1920 (additional source)
Cyartonema zosterae (Allgén, 1929) Juario, 1972 (additional source)
Cyatholaimidae Filipjev, 1918 (additional source)
Cyatholaimus Bastian, 1865 (additional source)
Cylicolaiminae Platonova, 1970 (additional source)
Cylicolaimus de Man, 1889 (additional source)
Cylicolaimus magnus (Villot, 1875) de Man, 1889 (additional source)
Cylicolaimus obtusidens Ditlevsen, 1926 (additional source)
Dagda Southern, 1914 (additional source)
Daptonema Cobb, 1920 (additional source)
Daptonema circulum (Vitiello, 1971) Lorenzen, 1977 (additional source)
Daptonema longicaudatum (Filipjev, 1922) Lorenzen, 1977 (additional source)
Daptonema macrocirculus (Allgén, 1959) (basis of record)
Daptonema nanum (Lorenzen, 1971) Lorenzen, 1977 (additional source)