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  Animalia
    Bilateria
     Deuterostomia
      Echinodermata
             [Eleutherozoa]
             [Pelmatoza]
             [Pelmatozoa]
        Asterozoa
               [Stelleroidea]
            Ophiuroidea
                    Phrynophiurida
                      Euryalina
                            Gorgonocephalidae
                                     Asteroporpa
                                           [Astroporpa]
                                             Asteroporpa annulata
                                                   [Astroporpa annulata]
                                     Astrochele
                                             Astrochele laevis
                                     Astrocnida
                                             Astrocnida isidis
                                     Astrocyclus
                                             Astrocyclus caecilia
                                     Astrophyton
                                           [Astrogordius]
                                             Astrophyton cacaoticum
                                                   [Astrogordius cacaoticus]
                                             Astrophyton muricatum
                                                   [Euryale muricatum]
                                     Astrothamnus
                                             Astrothamnus echinacea
                                     Conocladus
                                             Conocladus oxyconus
                                     Gorgonocephalus
                                             Gorgonocephalus arcticus
                                                   [Gorgonocephalus agassizi]
                                             Gorgonocephalus caputmedusae
                                             Gorgonocephalus eucnemis
                                                   [Gorgonocephalus caryi]
                                                   [Gorgonocephalus japonicus]
                                             Gorgonocephalus lamarcki