Age - Miocene Commonality - Rare
The extinct hammerhead ( Sphyrna laevissima ) lived during the Miocene and is a rare find in New Jersey. The teeth of this well known shark range in size from ¼ of an inch up to an inch, with the average being a little less than ½ inch. The cutting edge is smooth with a distinctive notch on the distal side often referred to as the “hammerhead notch”. There is a strong nutrient grove.
Note: I have personally not found any specimens of S. laevissima
in NJ, and include it in the website based on the reports of
A pair of hammerheads collected from
Calvert Cliffs, MD.
An infrequent find from Monmouth County, NJ.
Labial and lingual views.
Note the distinctive “hammerhead notch” and lack of
serrations on the crown.