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 Diplotriaenoidea Skrjabin, 1916 [monotypic] 1 Family Diplotriaenidae Skrjabin, 1916