Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Nematoda Gegenbaur, 1859 - round worms
     Class Dorylaimea Hodda, 2007
       Subclass Dorylaimia Inglis, 1983 [monotypic]
         Superorder Dorylaimica Hodda, 2007 [monotypic]
           Order Dorylaimida Pearse, 1942
             Suborder Nygolaimina Ahmad & Jairajpuri, 1979 [monotypic]
               Superfamily Nygolaimoidea Thorne, 1935
                 1 Family Aetholaimidae Jairajpuri, 1965
                 2 Family Nygellidae Andrassy, 1958
                 3 Family Nygolaimellidae Clark, 1961
                 4 Family Nygolaimidae Thorne, 1935