[Phylum] [Arthropoda] Siebold, 1848 - arthropods [Class] Pycnogonida Latreille, 1810 - pycnogonids Order Pantopoda Gerstaecker, 1863 Suborder Eupantopodida Fry, 1978 Superfamily Rhynchothoracoidea Thompson, 1909 [monotypic] 1 Family Rhynchothoracidae Thompson, 1909