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  Animalia
    Bilateria
     Deuterostomia
      Echinodermata
             [Eleutherozoa]
             [Pelmatoza]
             [Pelmatozoa]
        Asterozoa
               [Stelleroidea]
            Ophiuroidea
                    Ophiurida
                      Gnathophiurina
                            Amphiuridae
                                     Acrocnida
                                           [Amphiura (Acrocnida)]
                                             Acrocnida brachiata
                                                   [Amphiura brachiata]
                                     Amphichondrius
                                             Amphichondrius granulosus
                                     Amphilimna
                                             Amphilimna olivacea
                                     Amphiocnida
                                             Amphiocnida putnami
                                     Amphiodia
                                             Amphiodia atra
                                             Amphiodia craterodmeta
                                             Amphiodia digitata
                                                   [Amphiura digitata]
                                             Amphiodia euryaspis
                                             Amphiodia gyraspis
                                             Amphiodia limbata
                                                   [Ophiolepis limbata]
                                             Amphiodia occidentalis
                                                   [Diamphiodia occidentalis]
                                             Amphiodia peloria
                                             Amphiodia periercta
                                                   [Diamphiodia periercta]
                                             Amphiodia planispina
                                                   [Amphiura planispina]
                                             Amphiodia psara
                                                   [Diamphiodia psara]
                                             Amphiodia pulchella
                                                   [Amphiura pulchella]
                                             Amphiodia repens
                                                   [Amphiura repens]
                                             Amphiodia rhabdota
                                             Amphiodia rossica
                                             Amphiodia trychna
                                             Amphiodia tymbara
                                             Amphiodia urtica
                                                   [Amphiodia barbarae]
                                                   [Ophiophragmus urtica]
                                     Amphioplus
                                             Amphioplus abdita
                                             Amphioplus coniortodes
                                             Amphioplus hexacanthus
                                                   [Amphiodia hexacanthus]
                                             Amphioplus macilentus
                                             Amphioplus macraspis
                                             Amphioplus strongyloplax
                                             Amphioplus thrombodes
                                             Amphioplus tumidus
                                     Amphipholis
                                             Amphipholis gracillima
                                                   [Ophiolepis gracillima]
                                             Amphipholis januarii
                                             Amphipholis pachybactera
                                             Amphipholis pugetana
                                                   [Amphioplus pugetana]
                                                   [Amphiura pugetana]
                                                   [Axiognathus pugetana]
                                             Amphipholis squamata
                                                   [Amphioplus squamata]
                                                   [Amphiura squamata]
                                                   [Axiognathus squamatus]
                                     Amphiura
                                             Amphiura abyssorum
                                             Amphiura acrystata
                                                   [Hemilepis acrystata]
                                             Amphiura borealis
                                             Amphiura carchara
                                             Amphiura chiajei
                                             Amphiura denticulata
                                             Amphiura diastata
                                                   [Amphiura verrilli]
                                                   [Monamphuira diastata]
                                             Amphiura diomedeae
                                             Amphiura fibulata
                                             Amphiura filiformis
                                             Amphiura fragilis
                                             Amphiura grandisquama
                                             Amphiura griegi
                                             Amphiura incana
                                             Amphiura otteri
                                             Amphiura palmeri
                                                   [Amphiura kuekenthali]
                                             Amphiura polyacantha
                                             Amphiura psilopora
                                             Amphiura securigera
                                             Amphiura semiermis
                                             Amphiura seminuda
                                                   [Ophionephthys seminuda]
                                                   [Pandelia seminuda]
                                             Amphiura serpentina
                                             Amphiura stimpsoni
                                             Amphiura sundevalli
                                     Axiognathus
                                     Diamphiodia
                                             Diamphiodia craterodmeta
                                     Dougalopus
                                             Dougalopus amphacantha
                                                   [Amphilimna pentacantha]
                                                   [Ophiocnida amphacantha]
                                             Dougalopus gastracanthus
                                                   [Amphiura gastracanthus]
                                     Hemilepis
                                     Monamphiura
                                             Monamphiura sundevalli
                                     Monamphuira
                                     Nullamphiura
                                             Nullamphiura psilopora
                                     Ophiocnida
                                             Ophiocnida cubana
                                             Ophiocnida hispida
                                                   [Ophiolepis hispida]
                                             Ophiocnida scabriuscula
                                                   [Amphiura scabriuscula]
                                     Ophionema
                                             Ophionema intricata
                                     Ophionephthys
                                             Ophionephthys limicola
                                     Ophiophragmus
                                             Ophiophragmus filograneus
                                                   [Ophiocnida filograneus]
                                             Ophiophragmus luetkeni
                                                   [Amphipholis luetkeni]
                                             Ophiophragmus marginatus
                                             Ophiophragmus moorei
                                             Ophiophragmus pulcher
                                             Ophiophragmus septus
                                                   [Amphiura septa]
                                                   [Amphiura septus]
                                             Ophiophragmus wurdemanii
                                                   [Amphiura wurdemanii]
                                     Ophiostigma
                                             Ophiostigma isacanthum
                                                   [Ophiura isacanthum]
                                     Pandelia
                                     Pandellia
                                             Pandellia carchara
                                             Pandellia leptodoma
                                     Unioplus
                                             Unioplus macraspis