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Pycnodonte mutibilis and Exogyra cancellata

Cretaceous, Reedy Point, Delaware


Posted just as a curiosity. 

I found two shells next to each other in a shovel full of sand. They were broken at the edges and caked in the sand. I twisted them around and they kinda, sorta fit together. I got them home and started to wash the off. I realized right away that the flatter one, washed first, was not the same species as the rounder one. One was a Pycnodonte and the other an Exogyra. Then, I washed off the second one. I don't quite know why because they are both common enough that I wouldn't bother to keep them. Except, I found the rounded valve of a Pycnodonte had grown inside the Exogyra! Still have my doubts as to whether the flatter Pycnodonte valve is a match, but it was a fun discovery nonetheless.

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Delaware Fossils

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Photo Information for Pyncno-Gyra

Taken with Canon Canon EOS 80D

  • 59 mm
  • 1/60
  • f f/5.6
  • ISO 16000
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