fossil marine animal genera Linnaeus, 1758 - animals
   Phylum Echinodermata Bruguière, 1789 - echinoderms
     "Cystoidea"
       Class †Eocrinoidea Jaekel, 1918
         1 Order †Imbricata Sprinkle, 1973
         2 Order †Gogiida Broadhead, 1982
         3 Order †Ascocystitida
         4 Order †Trachelocrinida Sumrall, 1997
         5 Order †uncertain