Carcharodon carcharias is the scientific name for the extant species of Great White shark. The fossil teeth of the Great white shark were originally categorized as Carcharodon rondeleti, and later on, as Carcharias semiserratus and Carcharias sulcidens. Pliocene records of Great whites are much more frequent than Miocene ones. Miocene Great white shark teeth are usually somewhat worn or reworked. In addition, it is widely known that Miocene Great white teeth are often found in rivers, where there is a reworked mixture of different layers, from the Eocene to Pleistocene (i.e. along the east coast of the USA). Not as well known is that diggers and dealers protect their secret locations. For example, material from the Meherrin River, near Murfreesboro, Hertford County, North Carolina, USA, and the James City or Chowan River Formation may be represented as from the more popular Cooper River, South Carolina, USA.