Acantholaimus Allgén, 1933 (basis of record)
Amphimonhystera Allgén, 1929 (basis of record)
Aponema Jensen, 1978 (basis of record)
Camacolaiminae Micoletzky, 1924 (basis of record)
Camacolaimus de Man, 1889 accepted as Deontolaimus de Man, 1880 (basis of record)
Chromadoria (basis of record)
Chromadorida (basis of record)
Chromadoridae Filipjev, 1917 (basis of record)
Chromadorina (basis of record)
Chromadorita Filipjev, 1922 (basis of record)
Chromadoroidea Filipjev, 1917 (basis of record)
Chromaspirina Filipjev, 1918 (basis of record)
Crenopharynginae Platonova, 1976 (basis of record)
Cyatholaimidae Filipjev, 1918 (basis of record)
Cyatholaiminae Filipjev, 1918 (basis of record)
Deontolaimus de Man, 1880 (basis of record)
Desmodoridae Filipjev, 1922 (basis of record)
Desmodoroidea Filipjev, 1922 (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)
Enchelidiidae Filipjev, 1918 (basis of record)
Enoplia (basis of record)
Enoplida (basis of record)
Enoplina (basis of record)
Enoploidea Dujardin, 1845 (basis of record)
Eurystomina Filipjev, 1921 (basis of record)
Greeffiella Cobb, 1922 (basis of record)
Greeffiellini Filipjev, 1929 (basis of record)
Halalaiminae De Coninck, 1965 (basis of record)
Halalaimus de Man, 1888 (basis of record)
Hypodontolaiminae De Coninck, 1965 (basis of record)
Ironoidea de Man, 1876 (basis of record)
Leptolaimidae Örley, 1880 (basis of record)
Leptolaiminae Örley, 1880 (basis of record)
Leptolaimus de Man, 1876 (basis of record)
Longicyatholaimus Micoletzky, 1924 (basis of record)
Meyliidae De Coninck, 1965 (basis of record)
Meyliinae (basis of record)
Microlaimidae Micoletzky, 1922 (basis of record)
Microlaimoidea Micoletzky, 1922 (basis of record)
Microlaimus de Man, 1880 (basis of record)
Molgolaiminae Jensen, 1978 (basis of record)
Monhysterida (basis of record)
Monhysteridae de Man, 1876 (basis of record)
Monhysteroidea Filipjev, 1929 (basis of record)
Oncholaimoidea Filipjev, 1916 (basis of record)
Oxystomina Filipjev, 1918 (basis of record)
Oxystominidae Chitwood, 1935 (basis of record)
Oxystomininae Chitwood, 1935 (basis of record)
Paracanthonchus Micoletzky, 1924 (basis of record)
Phanodermatidae Filipjev, 1927 (basis of record)
Phanodermopsis Ditlevsen, 1926 (basis of record)
Spilipherinae Filipjev, 1918 (basis of record)
Spiriniinae Chitwood, 1936 (basis of record)
Thalassomonhystera Jacobs, 1987 (basis of record)
Theristus Bastian, 1865 (basis of record)
Tricominae Lorenzen, 1969 (basis of record)
Xyalidae Chitwood, 1951 (basis of record)