Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Echinodermata Bruguière, 1789 - echinoderms
     01 Class †Ctenocystoidea Robison & Sprinkle, 1969
     02 Class †Homostelea Gill & Caster, 1960
     03 Class †Stylophora Gill & Caster, 1960 - stylophorans
     04 Class †Helicoplacoidea Durham & Caster, 1963
     05 Class †Eocrinoidea Jaekel, 1918
     06 Class †Parablastoidea Hudson, 1907
     07 Class †Paracrinoidea Regnell, 1945
     08 Class †Coronoidea Brett et al., 1983
     09 Class †Blastoidea Say, 1825
     10 Class †Diploporita Müller, 1854
     11 Class Rhombifera Pérès, 1956
     12 Class Crinoidea Miller, 1821 - sea lilies and feather stars
     15 Class †Bothriocidara