Thursday, July 23, 2009

Devonian Clam Modiomorpha concentrica

These pictures are of a Devonian Period clam called Modiomorpha concentrica. It was found in Clark County, Indiana in the Jeffersonville Limestone. A coral is growing on part of the shell that is probably an Aulocystis.

This fossil belongs to my cousin who has been cleaning it.







I used A Monograph of the Fossil Shells of the Silurian and Devonian Rocks of Kentucky by Henry Nettelroth (1889) found here. This first image is from Plate II figure 10.


The last image is from Plate II, figure 11.

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