fossil marine animal genera Linnaeus, 1758 - animals Phylum Arthropoda Siebold, 1848 - arthropods Class †Thylacocephala Pinna et al., 1982 1 Order †Concavicarida Briggs & Rolfe, 1983 2 Order †Conchyliocarida Secretan, 1985 3 Order †incertae sedis