#genus_Littorina__Littorina  type genus of the family Littorinidae: periwinkles
  supertype:  mollusk_genus__molluskgenu  a genus of mollusks
  member:  periwinkle.seasnail
  member of:  family_Littorinidae__Littorinidae  periwinkles
     member of:  class_Gastropoda__Gastropoda__Gasteropoda__class_Gasteropoda  snails and slugs and their relatives
        member of:  phylum_Mollusca__Mollusca  gastropods; bivalves; cephalopods; chitons
           member of:  kingdom_Animalia__Animalia__animal_kingdom  taxonomic kingdom comprising all living or extinct animals

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