No bu Tamura/Wikimedia Commons The Carboniferous Period, which began 359 million years ago ... which evolved from broad-toothed mako sharks during the Middle Eocene, some 45 million years ago. The ...

This species is part of a group informally called “chipmunk sharks”, due to their small size and unusual dentition. These ...

This time period took place 359 to 299 million ... tropically located regions during the Carboniferous. In the U.S., scientists divide the Carboniferous into two parts: the earlier Mississipian ...