.9" Fossil Crow Shark (Squalicorax) Tooth - Kansas

Squalicorax would have had a body type very similar to today's grey sharks, but the teeth most closely resemble that of tiger sharks. It was likely a coastal predator, but there is evidence it was also a scavenger: a Squalicorax tooth was found embedded on the bone of a hadrosaur. Hadrosaurs were terrestrial dinosaurs, so that hadrosaur likely had died on land before being swept out to sea.

The Smoky Hill Chalk Member of the Niobrara Chalk formation is a Cretaceous conservation Lagerstätte, or fossil-rich geological formation, known primarily for its exceptionally well-preserved marine reptiles. It outcrops in parts of northwest Kansas--its most famous localities for fossils--and in southeastern Nebraska. Large, well-known fossils excavated from the Smoky Hill Chalk include marine reptiles such as plesiosaurs, large bony fish such as Xiphactinus, mosasaurs, pterosaurs, and turtles.