Kingdom Animalia Linnaeus, 1758 - animals Phylum Nematoda Gegenbaur, 1859 - round worms Class Dorylaimea Hodda, 2007 Subclass Trichocephalia Hodda, 2007 [monotypic] Superorder Trichocephalica Hodda, 2007 Order Marimermithida Rubtzov, 1980 [monotypic] Suborder Marimermithina Hodda, 2007 [monotypic] 1 Superfamily Marimermithoidea Rubtzov & Platonova, 1974 [monotypic]