Dermal denticle of a Paleozoic shark called Petrodus. Found in the Indian Springs Formation of Crawford County, Indiana. Shark swam around in Mississippian Period seas. Fossil is about 5 mm in diameter. Pictures taken under microscope at 23x.
Monday, July 11, 2011
Petrodus
Dermal denticle of a Paleozoic shark called Petrodus. Found in the Indian Springs Formation of Crawford County, Indiana. Shark swam around in Mississippian Period seas. Fossil is about 5 mm in diameter. Pictures taken under microscope at 23x.