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.
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