[Phylum] [Arthropoda] Siebold, 1848 - arthropods
   [Class] Pycnogonida Latreille, 1810 - pycnogonids
     1 Genus †Cambropycnogon Waloszek & Dunlop, 2002
     2 Genus †Haliestes Siveter, Suton, Briggs & Siveter, 2004
     3 Genus †Flagellopantopus Poschmann & Dunlop, 2006
     4 Genus †Palaeomarachne Rudkin, Cuggy, Young & Thompson, 2013
     5 Family †Palaeoisopodidae Dubinin, 1957 [monotypic]
     5 Genus †Pentapantopus Kühl, Poschmann & Rust, 2013
     6 Family †Palaeopantopodidae Broili, 1930 [monotypic]
     7 Order Pantopoda Gerstaecker, 1863