Alternative combinations: Carcharias laevissimus, Galeocerdo laevissimus
Full reference: E. D. Cope. 1868. An addition to the vertebrate fauna of the Miocene period, with a synopsis of the extinct Cetacea of the United States. Proceedings of the Academy of Natural Sciences of Philadelphia 19(4):138-157
Type specimen: Its type locality is James T. Thomas estate, which is in a Langhian marine horizon in the Calvert Formation of Maryland.