#order_Sirenia__Sirenia  manatees; dugongs; Stellar's sea cow
  supertype:  animal_order  the order of animals
  member of:  subclass_Eutheria
  member:  sea_cow__seacow__sirenian_mammal__sirenian  any of two families of large herbivorous aquatic mammals with paddle-shaped tails and flipper-like forelimbs and no hind limbs
  member:  family_Trichechidae__Trichechidae  comprising only the manatees
     member:  Trichechus__genus_Trichecus  type and sole genus of the Trichechidae
        member:  manatee__trichechusmanatu  sirenian mammal of tropical coastal waters of America; the flat tail is rounded
  member:  family_Dugongidae__Dugongidae  a family of mammals of order Sirenia including dugongs and Steller's sea cow
     member:  genus_Dugong  type genus of the Dugongidae comprising only the dugongs
        member:  dugong__Dugong_dugon  sirenian tusked mammal found from eastern Africa to Australia; the flat tail is bilobate
     member:  genus_Hydrodamalis__Hydrodamalis  a genus of the family Dugongidae comprising only Steller's sea cow
        member:  Steller's_sea_cow__Hydrodamalis_gigas  extinct large sirenian mammal formerly found near Asiatic coast of the Bering Sea

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