Adenophorea
Anoplostomatidae
Anticomidae Filipjev, 1918
Capillariidae
Cryptonchidae Chitwood, 1969
Enchelidiidae Filipjev, 1918
Enoplidae Dujardin, 1845
Eurystominidae
Ironidae De Man, 1876
Lauratonematidae Gerlach, 1953
Leptosomatidae Filipjev, 1916
Odontolaimidae
Oncholaimidae Filipjev, 1916
Onchulidae
Oxystominidae Chitwood, 1935
Palaeonematidae Poinar, Kerp & Hass, 2008
Pandolaimidae
Paroxystominidae
Phanodermatidae Filipjev, 1927
Prismatolaimidae Micoletzky, 1922
Rhabdodemaniidae Filipjev, 1934
Rhaptothyreidae
Symplocostomatidae
Synochidae
Thoracostomopsidae De Coninck, 1965
Tobrilidae
Trefusiidae Gerlach, 1966
Triodontolaimidae De Coninck, 1965
Tripylidae De Man, 1879
