Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Chelicerata Heymons, 1901
       Class Pycnogonida Latreille, 1810 - pycnogonids
         Order Pantopoda Gerstaecker, 1863
           Suborder Eupantopodida Fry, 1978
             Superfamily Colossendeidoidea Hoek, 1881 [monotypic]
               Family Colossendeidae Hoek, 1881
                 1 Subfamily Colossendeinae Hoek, 1881
                 2 Subfamily Hedgpethiinae Pushkin, 1990