Lonchidion selachos was a shark-like fish (or hybodont) that lived in the freshwater rivers, lakes, and estuaries in North America. Their fossils are often found in the Hell Creek and Lance formations of Montana and Wyoming.
Lonchidion selachos was a shark-like fish (or hybodont) that lived in the freshwater rivers, lakes, and estuaries in North America. Their fossils are often found in the Hell Creek and Lance formations of Montana and Wyoming.