Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Echinodermata Bruguière, 1789 - echinoderms
     Subphylum †Blastozoa Sprinkle, 1973 see Infraphylum Blastozoa Sprinkle, 1973
       Genus †Meristoschisma Sprinkle, 1973
       1 Class †Blastoidea Say, 1825
       2 Class †Rhombifera Pérès, 1956
       3 Class †Diploporita Müller, 1854
       4 Class †Eocrinoidea Jaekel, 1918
       5 Class †Parablastoidea Hudson, 1907