Fossil Friday 2/12/16: An ark shell


UF 203814, a valve of the fossil ark clam Anadara (Rasia) dariensis. Photo © IVP FLMNH.

This week’s Fossil Friday feature is a fossil ark shell called Anadara (Rasia) dariensis. This clam was found stuck to rocks in the Early and Late Miocene (21-8 mya) waters around Panama in both the Caribbean and the Pacific.Their tiny teeth are arranged in a straight line along the hinge line on the inside of the shell. This type of dentition is called “taxodont.”

Read the “Fossils of Panama” page on this mollusc here.


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