Kingdom Animalia Linnaeus, 1758 - animals Phylum Echinodermata Bruguière, 1789 - echinoderms Subphylum Echinozoa von Zittel, 1895 see Infraphylum Echinozoa Haeckel, in Von Zittell, 1895 Class Echinoidea (Leske, 1778) - sea urchins and sand dollars Order †Palaechinoida Genus †Melonechinus Meek & Worthen, 1860