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
           1 Class Crinoidea Miller, 1821 - sea lilies and feather stars
           2 Class Holothuroidea (de Blainville, 1834) - sea cucumbers
           3 Class Echinoidea (Leske, 1778) - sea urchins and sand dollars
           4 Class Asteroidea Blainville, 1830 - sea stars
           5 Class Ophiuroidea Gray, 1840 - brittle stars and basket stars