#family_Trichechidae__Trichechidae  comprising only the manatees
  supertype:  mammal_family  a family of mammals
  member of:  order_Sirenia
  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

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