1. Subfamily Cyatholaiminae Filipjev, 1918
   1. Genus Cyatholaimus Bastian, 1865
   2. Genus Cyathoshiva Datta, Miljutin, Chakraborty & Mohapatra, 2016
   3. Genus Longicyatholaimus Micoletzky, 1924
   4. Genus Marylynnia (Hopper, 1972) Hopper, 1977
   5. Genus Metacyatholaimus Stekhoven, 1942
   6. Genus Paralongicyatholaimus Schuurmans Stekhoven, 1950
   7. Genus Paramarylynnia Huang & Zhang, 2007
   8. Genus Phyllolaimus Murphy, 1964
   9. Genus Praeacanthonchus Micoletzky, 1924
   10. Genus Xyzzors Inglis, 1963
   11. Genus Marilynia Hopper, 1972 accepted as Marylynnia (Hopper, 1972) Hopper, 1977 (preoccupied)
   12. Genus Metachoniolaimus Schuurmans Stekhoven, 1950 accepted as Metacyatholaimus Stekhoven, 1942 (junior synonym)
   13. Genus Necticonema Marion, 1870 accepted as Cyatholaimus Bastian, 1865
   14. Genus Phylolaimus Murphy, 1964 accepted as Phyllolaimus Murphy, 1964 (lapsus)
   15. Genus Praecanthonchus accepted as Praeacanthonchus Micoletzky, 1924 (spelling mistake)
   16. Genus Dispirella Cobb, 1933 (uncertain > taxon inquirendum)
   17. Genus Heterocyatholaimus Allgén, 1935 (uncertain > taxon inquirendum)
   18. Genus Micracanthonchus Allgén, 1959 (uncertain > taxon inquirendum, doubtful genus (op. Hope and Murphy, 1972))
2. Subfamily Nyctonematinae Bussau, 1993
   1. Genus Nyctonema Bussau, 1993
3. Subfamily Paracanthonchinae
   1. Genus Acanthonchus Cobb, 1920
   2. Genus Biarmifer Wieser, 1954
   3. Genus Isacanthonchus Gagarin & Thanh, 2008
   4. Genus Paracanthonchus Micoletzky, 1924
   5. Genus Paracyatholaimoides Gerlach, 1953
   6. Genus Paracyatholaimus Micoletzky, 1922
   7. Genus Seuratiella Ditlevsen, 1921
   8. Genus Harveyjohnstonia Mawson, 1953 accepted as Paracanthonchus Micoletzky, 1924 (synonym)
   9. Genus Paraseuratiella Schuurmans Stekhoven, 1950 accepted as Paracanthonchus Micoletzky, 1924 (synonym)
   10. Genus Seuratia Ditlevsen, 1918 accepted as Seuratiella Ditlevsen, 1921 (homonym to Seuratia Skrjabin, 1916)
   11. Genus Dentatonema Kreis, 1928 (uncertain > taxon inquirendum, doubtful genus (op. Hope and Murphy, 1972))
4. Subfamily Pomponematinae
   1. Genus Craspodema Gerlach, 1956
   2. Genus Nannolaimoides Ott, 1972
   3. Genus Pomponema Cobb, 1917
   4. Genus Anaxonchium Cobb, 1920 accepted as Pomponema Cobb, 1917 (synonym (op. Lorenzen, 1972))
   5. Genus Cobbiacanthonchus Allgén, 1953 accepted as Pomponema Cobb, 1917 (synonym (op. Hope & Murphy, 1972))
   6. Genus Endolaimus Filipjev, 1922 accepted as Pomponema Cobb, 1917
   7. Genus Haustrifera Wieser, 1954 accepted as Pomponema Cobb, 1917 (synonym (op. Lorenzen, 1972))
   8. Genus Kraspedonema Gerlach, 1954 accepted as Craspodema Gerlach, 1956 (synonim)
   9. Genus Nummocephalus Filipjev, 1946 accepted as Pomponema Cobb, 1917 (synonym, op. Lorenzen, 1972)
   10. Genus Parapomponema Ott, 1972 accepted as Pomponema Cobb, 1917
   11. Genus Propomponema Ott, 1972 accepted as Pomponema Cobb, 1917
   12. Genus Dispira Cobb, 1933 (uncertain > taxon inquirendum)
5. Subfamily Xenocyatholaiminae Gerlach & Riemann, 1973
   1. Genus Xenocyatholaimus Gerlach, 1953

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