Hemipristis serra (Agassiz.)
Pristine matrix free tooth from a red Rea shark (sometimes called a 'snaggletooth' shark). Blade shows wicked serrations on both edges. A 'beauty'.
Miocene, Helvetian, Calvert Formation.
Plum Point, Calvert County, Maryland, USA.
Tooth : 2.5 cm. across width of the roots.
