Large 1 1/2 Inch Calymene Niagarensis Trilobite

This is a very nice Calymene niagarensis trilobite from the Rochester Shale near Middleport, NY. It has a beautiful dark black shell, is nicely inflated and wonderfully detailed. It's quite large for the species at 1 1/2 inches in length and layed out nicely on a rectangular piece of shale.