Double Shell


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    Key to Aquatic Macroinvertebrates in Utah - Double Shell

    Double Shelled Organisms - Clams and Mussels (Bivalves)

    Clams and mussels, or bivalves, belong to the phylum Mollusca and are identified by a double shell that is hinged on one side.  Click on the pictures below to further identify your organism.

    1. Shell is greater than 25 mm. shell 

    2. Shell is less than 25 mm.    shell

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