Order MONHYSTERIDA
Family AXONOLAIMIDAE
Genus Axonolaimus De Man, 1889
Genus Ascolaimus Ditlevsen, 1919
Family LINHOMOEIDAE
Genus Desmolaimus De Man, 1880
Genus Megadesmolaimus Wieser, 1954
Family XYALIDAE
Genus Daptonema Cobb, 1920
Genus Theristus Bastian, 1865
Family MONHYSTERIDAE
Genus Thalassomonhystera Jacobs, 1987

Order ENOPLIDA
Family THORACOSTOMOPSIDAE
Genus Enoplolaimus De Man, 1893
Family OXYSTOMINIDAE
Genus Halalaimus De Ma, 1888
Family ONCHOLAIMIDAE
Genus Oncholaimus Dujardin, 1845
Genus Viscosia De Man, 1890
Family RHABDITIDAE
Genus Rhabditis Dujardin, 1845