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
         Subclass †Inadunates
           Genus †Aesiocrinus Miller & Gurley, 1890
           Genus †Carabocrinus Billings, 1857
           Genus †Cyathocrinites Miller, 1821
           Genus †Ectenocrinus Miller, 1889
           Genus †Hybocrinus Billings, 1857