Re: Rugops and Spinostropheus in USA Today

[Mickey Mortimer <Mickey_Mortimer111@msn.com>]

Mark Van Tomme wrote-

> It could be indeed,
> In fact they assigned them to Carcharodontosaurus and
> Spinosaurus exclusively on the basis of dental
> caracters.They found better to assume the spinosaurid
> teeth weren't Irritator because of the time difference
> between Irritator's Santana Formation(Aptian-Albian)
> and the Alcantara formation (Cenomanian)teeth.Also by
> the environmental similarities between SA and North
> Africa
> at that time,wich were not the same as that of the
> Santana Formation.

What's the reference for this study?
Even if the teeth were too late to be considered congeneric with Irritator,
they could always be more closely related to Irritator than to Spinosaurus.
And since Giganotosaurus is from the Early Cenomanian, I see no reason at
all to doubt the Alcantara teeth belong to it.

Mickey Mortimer