Megalodon lived 28-2.5 million years ago. His remains were discovered in all parts of the world; -Adult megalodon sizes range from 10 to 17 meters in length;
Megalodon (Otodus megalodon), meaning “big tooth,” is an extinct species of shark that lived from about 23 to 3.6 million years ago (mya), during the early Miocene to the Pliocene.
However, now it is classified into the extinct family Otodontidae, which diverged from the large white shark during the Early Cretaceous. Its placement of the genus is still under discussion, the authors place it in Carcharocle, Megaselachus, Otodus or Procarcharodon.
This is because transitional fossils have been found, showing that Megalodon is the final chronospecies of the genus of giant sharks, originally belonging to the genus Otodus, which evolved during the Paleocene.