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  Animalia
    Bilateria
     Deuterostomia
      Echinodermata
             [Eleutherozoa]
             [Pelmatoza]
             [Pelmatozoa]
        Asterozoa
               [Stelleroidea]
            Ophiuroidea
                    Ophiurida
                      Laemophiurina
                            Ophiacanthidae
                                     Ophiacantha
                                             Ophiacantha abyssa
                                             Ophiacantha abyssicola
                                             Ophiacantha adiaphora
                                             Ophiacantha anomala
                                             Ophiacantha aristata
                                             Ophiacantha atopostoma
                                             Ophiacantha bathybia
                                             Ophiacantha bidentata
                                             Ophiacantha enneactis
                                             Ophiacantha eurythra
                                             Ophiacantha gratiosa
                                                   [Ophiotreta gratiosa]
                                             Ophiacantha lepidota
                                             Ophiacantha littoralis
                                             Ophiacantha macrarthra
                                             Ophiacantha nutrix
                                             Ophiacantha phragma
                                             Ophiacantha rhachophora
                                             Ophiacantha trachybactra
                                                   [Ophiolebes trachybactra]
                                     Ophiacanthella
                                             Ophiacanthella acontophora
                                             Ophiacanthella troscheli
                                     Ophialcaea
                                     Ophiolebes
                                             Ophiolebes brevispina
                                             Ophiolebes diaphora
                                             Ophiolebes pachybactra
                                             Ophiolebes pavcispina
                                             Ophiolebes tylota
                                     Ophiolimna
                                             Ophiolimna bairdi
                                                   [Ophiacantha bairdi]
                                             Ophiolimna littoralis
                                             Ophiolimna mixta
                                             Ophiolimna perfida
                                     Ophiomitrella
                                             Ophiomitrella clavigera
                                             Ophiomitrella glabra
                                                   [Ophialcaea glabra]
                                     Ophiomyces
                                             Ophiomyces frutectosus
                                             Ophiomyces mirabilis
                                     Ophiopthalmus
                                             Ophiopthalmus cataleimmoidus
                                                   [Ophiacantha cataleimmoida]
                                             Ophiopthalmus diplasia
                                                   [Ophiacantha diplasia]
                                             Ophiopthalmus eurypoma
                                                   [Ophiacantha eurypoma]
                                             Ophiopthalmus longispina
                                             Ophiopthalmus normani
                                                   [Ophiacantha normani]
                                     Ophiosemnotes
                                             Ophiosemnotes paucispina
                                                   [Ophiolebes paucispina]
                                     Ophiothamnius
                                             Ophiothamnius vicarius
                                     Ophiotholia
                                             Ophiotholia mitrephora
                                     Ophiotoma
                                             Ophiotoma coriacea
                                     Ophiotreta