Kingdom Animalia Linnaeus, 1758 - animals
Phylum Nematoda Gegenbaur, 1859 - round worms
Class Chromadorea Inglis, 1983
Subclass Plectia Hodda, 2007
Superorder Rhabditica Hodda, 2007
Order Spirurida Railliet, 1914
Suborder Spirurina Railliet & Henry, 1915
Superfamily Aproctoidea Yorke & Maplestone, 1926
1 Family Aproctidae Yorke & Maplestone, 1926
2 Family Desmidocercidae Cram, 1927