Friday February 5, 2021
Instructor: Arthur Reed, P.G.
These
are the fossilized lower anterolateral teeth of Notidanodon dentatus, an
extinct cow shark from the Mesozoic Period 
Sharks
of the Notidanodon genus were globally widespread in the Jurassic,
Cretaceous and Paleogene Periods. They were carnivorous opportunistic
scavengers and lived in the deep ocean.
This
specimen was found at Mangahouanga Stream, inland Hawke’s Bay and is 86.5 -
66.0 million years old. The scale bar is 1 cm.
Related
fun video taken in the coastal waters of South Africa.
Approximate
location of the fossil in the above photo.
Generalized
size comparison.