Another Cretaceous Shark Tooth

[Mike from North Queensland]

Here is another shark tooth that I have no clue about.

Found in Australian, Albian cretaceous deposit in the toolebuc formation near Richmond Queensland.

tooth is just under 7 mm long

thanks in advance for any input

Mike D

[MikaelS]

It's probably simply a cusp with a bit of the root preserved of the common cardabiodontid. It's a low diversity selachian fauna in the Toolebuc so not much to chose from in that size range. The overlying Mackunda is significantly more diverse (well oxygenated bottom waters).