Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Echinodermata Bruguière, 1789 - echinoderms
     Subphylum Eleutherozoa Bell, 1891
       Class Asteroidea Blainville, 1830 - sea stars
         1 Order Platyasterida Spencer, 1951
         2 Order Paxillosida Perrier, 1884
         3 Order Valvatida Perrier, 1884
         4 Order Spinulosida Perrier, 1884
         5 Order Forcipulatida Perrier, 1884