Protolamna

Protolamna is an extinct genus of mackerel shark from the Cretaceous Period. The genus is known from Europe, Asia and North America.

Species
Seven species are currently attributed to this genus, including the following:
 * P. borodini (Maastrichtian, New Jersey)
 * P. carteri (Cenomanian, Texas)
 * P. compressidens (Turonian-Coniacian, Belgium, France, Texas)
 * P. gigantea (Cenomanian, Minnesota)
 * P. ricaurtei (Barremian-Aptian Paja Formation, Colombia)
 * P. roanokeensis (Albian, Texas)
 * P. sokolovi (Aptian-Albian, Russia)