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.