Acantholaimus Allgén, 1933 (basis of record)
Actinonema Cobb, 1920 (basis of record)
Adoncholaiminae Gerlach & Riemann, 1974 (basis of record)
Adoncholaimus Filipjev, 1918 (basis of record)
Aegialoalaimidae Lorenzen, 1981 (basis of record)
Aegialoalaimus de Man, 1907 (basis of record)
Amphimonhystera Allgén, 1929 (basis of record)
Anoplostoma Bütschli, 1874 (basis of record)
Anoplostomatidae Gerlach & Riemann, 1974 (basis of record)
Anoplostomatinae (basis of record)
Anticoma Bastian, 1865 (basis of record)
Anticomidae Filipjev, 1918 (basis of record)
Antomicron Cobb, 1920 (basis of record)
Aponema Jensen, 1978 (basis of record)
Araeolaimus de Man, 1888 (basis of record)
Atrochromadora Wieser, 1959 (basis of record)
Axonolaimidae Filipjev, 1918 (basis of record)
Axonolaimoidea Filipjev, 1918 (basis of record)
Axonolaimus de Man, 1889 (basis of record)
Bathylaimus Cobb, 1894 (basis of record)
Belbolla Andrássy, 1973 (basis of record)
Calyptronema Marion, 1870 (basis of record)
Camacolaiminae Micoletzky, 1924 (basis of record)
Camacolaimus de Man, 1889 accepted as Deontolaimus de Man, 1880 (basis of record)
Ceramonema Cobb, 1920 (basis of record)
Ceramonematidae Cobb, 1933 (basis of record)
Chaetonema Filipjev, 1927 (basis of record)
Chaetonematinae Gerlach & Riemann, 1974 (basis of record)
Chitwoodia Gerlach, 1956 (basis of record)
Choanolaimus de Man, 1880 (basis of record)
Choniolaimus Ditlevsen, 1918 (basis of record)
Chromadora Bastian, 1865 (basis of record)
Chromadorella Filipjev, 1918 (basis of record)
Chromadoria (basis of record)
Chromadorida (basis of record)
Chromadoridae Filipjev, 1917 (basis of record)
Chromadorina (basis of record)
Chromadorinae Filipjev, 1917 (basis of record)
Chromadorita Filipjev, 1922 (basis of record)
Chromadoroidea Filipjev, 1917 (basis of record)
Chromaspirina Filipjev, 1918 (basis of record)
Comesomatidae Filipjev, 1918 (basis of record)
Comesomatinae Filipjev, 1918 (basis of record)
Coninckia Gerlach, 1956 (basis of record)
Coninckiidae Lorenzen, 1981 (basis of record)
Crenopharynginae Platonova, 1976 (basis of record)
Crenopharynx Filipjev, 1934 (basis of record)
Cricolaimus Southern, 1914 (basis of record)
Cyartonema Cobb, 1920 (basis of record)
Cyatholaimidae Filipjev, 1918 (basis of record)
Cyatholaiminae Filipjev, 1918 (basis of record)
Cyatholaimus Bastian, 1865 (basis of record)
Cylicolaiminae Platonova, 1970 (basis of record)
Cylicolaimus de Man, 1889 (basis of record)
Dagda Southern, 1914 (basis of record)
Daptonema Cobb, 1920 (basis of record)
Dasynemella Cobb, 1933 (basis of record)
Dasynemoides Chitwood, 1936 (basis of record)
Deontolaimus de Man, 1880 (basis of record)
Desmodora de Man, 1889 (basis of record)
Desmodoridae Filipjev, 1922 (basis of record)
Desmodorinae Filipjev, 1922 (basis of record)
Desmodoroidea Filipjev, 1922 (basis of record)
Desmolaiminae Schneider, 1926 (basis of record)
Desmoscolecidae Shipley, 1896 (basis of record)
Desmoscolecina (basis of record)
Desmoscolecinae (basis of record)
Desmoscolecoidea Shipley, 1896 (basis of record)
Desmoscolex Claparède, 1863 (basis of record)
Dichromadora Kreis, 1929 (basis of record)
Diodontolaimus Southern, 1914 (basis of record)
Diplolaimella Allgén, 1929 (basis of record)
Diplolaimelloides Meyl, 1954 (basis of record)
Diplopeltidae Filipjev, 1918 (basis of record)
Diplopeltinae Filipjev, 1918 (basis of record)
Diplopeltis Cobb, 1905 (basis of record)
Diplopeltoides Gerlach, 1962 (basis of record)
Diplopeltula Gerlach, 1950 (basis of record)
Dolicholaimus De Man, 1888 (basis of record)
Dorylaimopsinae De Coninck, 1965 (basis of record)
Dorylaimopsis Ditlevsen, 1918 (basis of record)
Dracognomus Allen & Noffsinger, 1978 (basis of record)
Draconema Cobb, 1913 (basis of record)
Draconematidae Filipjev, 1918 (basis of record)
Eleutherolaiminae Filipjev, 1922 (basis of record)
Eleutherolaimus Filipjev, 1922 (basis of record)
Enchelidiidae Filipjev, 1918 (basis of record)
Enoplia (basis of record)
Enoplida (basis of record)
Enoplidae Dujardin, 1845 (basis of record)
Enoplina (basis of record)
Enoploidea Dujardin, 1845 (basis of record)
Enoploides Ssaweljev, 1912 (basis of record)
Enoplolaiminae De Coninck, 1965 (basis of record)
Enoplolaimus de Man, 1893 (basis of record)
Enoplus Dujardin, 1845 (basis of record)
Epacanthion Wieser, 1953 (basis of record)
Epsilonema Steiner, 1927 (basis of record)
Epsilonematidae Steiner, 1927 (basis of record)
Epsilonematinae Steiner, 1927 (basis of record)