Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Echinodermata Bruguière, 1789 - echinoderms
     Subphylum Crinozoa Matsumoto, 1929 see Infraphylum Crinozoa Matsumoto, 1929
       Class Crinoidea Miller, 1821 - sea lilies and feather stars
         Genus Cenometra Clark, 1909
         Genus †Echmatocrinus Sprinkle, 1973
         Genus Isocrinus von Meyer, 1836
         Genus Nemaster Clark, 1909
         1 Subclass †Inadunates
         2 Subclass †Camerates
         3 Subclass †Flexibles
         4 Subclass Articulates see Subclass Articulata Miller, 1821