Megalodon

Megalodon was an extinct giant shark that lived roughly 23 to 3.6 million years ago. It was among the largest predatory fish known.

Megalodon tooth: A large, serrated fossil tooth from the extinct shark Otodus megalodon. Its abundant teeth provide the main evidence for the shark’s anatomy and feeding.
Otodus megalodon: The currently widely used scientific name for the extinct giant shark commonly called megalodon. This name reflects its placement in Otodus rather than the historically used Carcharocles.
Pisco Formation: A fossil-rich sedimentary formation in Peru preserving Miocene and Pliocene marine life. Its fossils include remains that document megalodon in a productive ancient marine ecosystem.
Otodus: An extinct genus of large mackerel sharks that includes megalodon and several earlier species. Megalodon is classified within this genus in current taxonomic treatments.
Megalodon bite force: An estimate of the force exerted by a megalodon’s jaws, inferred from fossil anatomy and biomechanical models. Models use its jaw dimensions to estimate how forcefully it could bite prey.
Fossil: Preserved remains or traces of organisms from the geological past. Megalodon is known chiefly through fossil teeth and occasional vertebrae.
Calvert Formation: A Miocene marine geological formation exposed along the western shore of Chesapeake Bay. Its fossil teeth and marine fauna record megalodon in the North Atlantic region.
Otodus chubutensis: An extinct large shark often regarded as a close ancestor or near relative of megalodon. Its earlier geological record helps frame megalodon’s evolutionary history.
Endothermy in sharks: The partial or complete maintenance of body temperatures above surrounding water in some shark lineages. Evidence for elevated body temperature may help explain megalodon’s broad geographic range.
Shark tooth: A mineralized dental structure shed and replaced repeatedly by sharks. Teeth fossilize far more readily than megalodon’s cartilaginous skeleton.

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