Echinodermata Bruguière, 1789 - echinoderms
   †Blastoidea Say, 1825
   Concentricycloidea Baker et al., 1986 - sea daisies
   Crinoidea Miller, 1821 - sea lilies and feather stars
   Echinoidea (Leske, 1778) - sea urchins and sand dollars
   †Edrioasteroidea Billings, 1858
   †Eocrinoidea Jaekel, 1918
   †Helicoplacoidea Durham & Caster, 1963
   Holothuroidea (de Blainville, 1834) - sea cucumbers
   †Homoiostelea Gill & Caster, 1960
   †Homostelea Gill & Caster, 1960
   †Ophiocistioidea (Sollas, 1899)
   †Paracrinoidea Regnell, 1945
   Stelleroidea Lamarck, 1816 see Subphylum Asterozoa von Zittel, 1895
   †Stylophora Gill & Caster, 1960 - stylophorans