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Tuesday, May 18, 2010

The Inner Atrypa


Above is a diagram of a North African Atrypa reticularis from the Middle Devonian Period.  It is on display at the Museum of Natural History in Paris, France.

This next image is of both sides of a Pseudoatrypa found in the Jeffersonville Limestone of Clark County, Indiana. 


This last picture is another example of the Pseudoatrypa from the same locality though in a little rougher shape.