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In a message dated 12/3/99 3:31:06 AM Pacific Standard Time,
<< Nick Longrich wrote...
> I saw something pretty cool the other day- a mosasaur called
> "Globicidens" or something like that. It had these absolutely
> massive jaws-no, I mean really heavy- and teeth like one-inch
> ball-bearings, sometimes with a tiny nipple in the middle.
The closely-related Prognathodon is very similar. A newly prepared skull
at the South Dakota School of Mines and Tech answers to the same
description--heavy is the operative word. The teeth, although pointed, are
_Globidens_. A very special, malacophagous (=durophagous) mosasaur
that probably fed on bivalves.
Nick has a point - most other
durophagores have flattened teeth that form a 'pavement'.
There is some variety of tooth morphology in Globidens. I collected a
fragmentary jaw that I suspect is Globidens with a flattened tooth that
looked like a bottle cap. Dan Varner.