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  Animalia
    Bilateria
     Deuterostomia
      Echinodermata
             [Eleutherozoa]
             [Pelmatoza]
             [Pelmatozoa]
        Asterozoa
               [Stelleroidea]
            Ophiuroidea
                    Ophiurida
                      Gnathophiurina
                            Ophiactidae
                                     Hemipholis
                                             Hemipholis elongata
                                                   [Ophiura elongata]
                                     Ophiactis
                                             Ophiactis abyssicola
                                             Ophiactis algicola
                                             Ophiactis balli
                                             Ophiactis cyanosticta
                                             Ophiactis lymani
                                             Ophiactis mulleri
                                             Ophiactis plana
                                             Ophiactis quinqueradia
                                             Ophiactis savignyi
                                                   [Ophiactis brocki]
                                                   [Ophiactis incisa]
                                                   [Ophiactis krebsi]
                                                   [Ophiactis reinhardtii]
                                                   [Ophiactis rheinhardtii]
                                                   [Ophiactis sexradia]
                                                   [Ophiactis virescens]
                                                   [Ophiolepis savignyi]
                                             Ophiactis simplex
                                                   [Ophiactis arenosa]
                                                   [Ophiactis orstedii]
                                                   [Ophiolepis simplex]
                                     Ophiopholis
                                             Ophiopholis aculeata
                                               Ophiopholis aculeata aculeata
                                               Ophiopholis aculeata japonica
                                               Ophiopholis aculeata kennerlyi
                                               Ophiopholis aculeata typica
                                             Ophiopholis bakeri
                                             Ophiopholis longispina