fossil marine animal genera Linnaeus, 1758 - animals Phylum Arthropoda Siebold, 1848 - arthropods Class Pycnogonida Latreille, 1810 - pycnogonids 1 Order †Palaeopantopoda Broili, 1930 2 Order †Palaeoisopoda Hedgpeth, 1978 3 Order Pantopoda Gerstäcker, 1863