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Organism
  Animalia
         [Metazoa]
      Echinodermata
             [Eleutherozoa]
             [Pelmatoza]
             [Pelmatozoa]
        Asterozoa
               [Stelleroidea]
            Asteroidea
                   [Concentricycloidea]
                    Spinulosida
                      Eugnathina
                            Pythonasteridae
                                     Asthenactis
                                             Asthenactis fisheri
                                             Asthenactis papyraceus