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 Dorylaimina Chitwood, 1933
               Superfamily Tylencholaimoidea Filipjev, 1934
                 1 Family Aulolaimoididae Jairajpuri, 1964
                 2 Family Leptonchidae Thorne, 1935
                 3 Family Mydonomidae Thorne, 1964
                 4 Family Tylencholaimidae Filipjev, 1934