Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Echinodermata Bruguière, 1789 - echinoderms
           Class Asteroidea Blainville, 1830 - sea stars
             1 Subclass Somasteroidea Spencer, 1951 see Order Platyasterida Spencer, 1951
             2 Subclass Euasteroidea Sladen, 1889