MONTANA FIELD GUIDE™

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Coins

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- Kingdom - Animals - Animalia
  - Phylum - Mollusks - Mollusca
    - Class - Snails / Slugs - Gastropoda
      - Order - Terrestrial Snails / Slugs - Stylommatophora
        
        Family - Coins - Megomphicidae
        
        Species
        
        Humped Coin
        Polygyrella polygyrella
        
        Other Names: Helix polygyrella, Helicodiscus polygyrella
        Species of Concern
        Native Species

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