living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
Count: 4k;54p;156c;911o;7123f;17,575g;4762s;36ss;8v;19; ‡1f;6g;7s;1ss; †1c;10o;10f;19g;1s
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
  Count: [c] 2k;51p;154c;900o;7001f;17,209g;4300s;33ss;8v; ‡1f;6g;7s;1ss; †1c;10o;10f;19g;1s
     Kingdom Animalia Linnaeus, 1758 - animals
    Count: [c] 38p;101c;595o;5766f;13,419g;3233s;32ss;3v; ‡1f;6g;7s;1ss; †1c;9o;10f;16g;1s
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
      Count: [c] 29p;70c;458o;5094f;11,476g;2933s;31ss;3v; ‡1f;6g;7s;1ss; †1c;8o;10f;11g;1s
         Phylum Echinodermata Bruguière, 1789 - echinoderms
        Count: [f] 4c;36o;148f;291g;148s; †1f;1g
           Subphylum Echinozoa von Zittel, 1895 see Infraphylum Echinozoa Haeckel, in Von Zittell, 1895
          Count: [f] 2c;21o;74f;156g;83s
             Class Echinoidea (Leske, 1778) - sea urchins and sand dollars
            Count: 15o;48f;96g;53s
               Subclass Euechinoidea Bronn, 1860
              Count: [f] 14o;46f;95g;52s
                 Superorder Gnathostomata Zittel, 1879
                Count: [g] 2o;10f;24g;15s
                   Order Clypeasteroida A. Agassiz, 1872 - true sand dollars
                  Count: [g] 9f;22g;12s
                     1 Suborder Clypeasterina von Zittel, 1879
                    Count: [g] 2f;4g;3s
                     2 Suborder Laganina Mortensen, 1948
                    Count: [g] 2f;9g;1s
                     3 Suborder Scutellina L. Agassiz, 1841
                    Count: [g] 4f;7g;6s
                     4 Suborder Rotulina Durham, 1955
                    Count: [*] 1f;2g;2s