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 Spiruroidea Oerley, 1885 Family Spiruridae Oerley, 1885