1.9" Metacanthina Issoumourensis Trilobite Fossil Devonian Age 400 Mil Yrs Old COA Vertebrae During this time
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1.9" Metacanthina Issoumourensis Trilobite Fossil Devonian Age 400 Mil Yrs Old COA Vertebrae During this time During this time Although they closely resembled modern crocodilians in body shape and lifestyle 8 Inches Thick (Matrix) Their shell is divided lengthwise into three lobes (hence