#genus_Arca__Arca  type genus of the family Arcidae: ark shells and blood clams
  supertype:  mollusk_genus__molluskgenu  a genus of mollusks
  member of:  family_Arcidae
  member:  ark_shell__arkshell  marine bivalve mollusk having a heavy toothed shell with a deep boat-like inner surface
  member:  blood_clam__bloodclam  red-blooded clam

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