#genus_Eptatretus  a genus of fossil fish of the family Myxinidae
  supertype:  fish_genus  any of various genus of fish
  member:  eptatretus
  member of:  family_Myxinidae__Myxinidae  slime-producing marine animals: hagfishes
     member of:  order_Cyclostomata__Cyclostomata  primitive jawless aquatic vertebrate: lampreys; hagfishes
        member of:  superclass_Agnatha__Agnatha  superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms
           member of:  subphylum_Vertebrata__Vertebrata__Craniata__subphylum_Craniata  fishes; amphibians; reptiles; birds; mammals
              member of:  phylum_Chordata__Chordata  comprises true vertebrates and animals having a notochord
                 member of:  kingdom_Animalia__Animalia__animal_kingdom  taxonomic kingdom comprising all living or extinct animals

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