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  Animalia
    Bilateria
     Deuterostomia
      Echinodermata
             [Eleutherozoa]
             [Pelmatoza]
             [Pelmatozoa]
        Asterozoa
               [Stelleroidea]
            Ophiuroidea
                    Phrynophiurida
                      Euryalina
                            Asteronychidae
                                     Asteronyx
                                             Asteronyx longifissus
                                             Asteronyx loveni
                                                   [Asteronyx dispar]
                                                   [Asteronyx lymani]