Kingdom Animalia Linnaeus, 1758 - animals Count: - Phylum Echinodermata Bruguière, 1789 - echinoderms Count: - Subphylum Echinozoa von Zittel, 1895 see Infraphylum Echinozoa Haeckel, in Von Zittell, 1895 Count: [*] 2c; †5c Class Echinoidea (Leske, 1778) - sea urchins and sand dollars Count: - Order Spatangoida L. Agassiz, 1840 Count: - Genus †Hemiaster Desor, 1847 Count: -