fossil marine animal genera Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Class †Marrelomorpha Beurlen, 1934 see Class Marrellomorpha Beurlen, 1934
       1 Order †Mimetasterida Beurlen, 1934 see Order Marrellida Raymond, 1935
       2 Order †Acercostraca Lehmann, 1955
       3 Order †Cyclina Richter, 1933 see Order Cyclida Schram, Vonk & Hof, 1997, nom. corr.