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Giant theropod from South Africa based on tooth

From: Ben Creisler

A new paper posted online:

Peter M. Galton and Ralph E. Molnar (2011)
An unusually large theropod dinosaur tooth from the Kirkwood Formation
(Lower Cretaceous) of South Africa. 
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen (advance
online publication)
DOI: http://dx.doi.org/10.1127/0077-7749/2011/0204


The basal part of the crown is described for a very large theropod dinosaur
tooth that probably came from the Kirkwood Formation (Lower Cretaceous) of
Eastern Cape Province, South Africa. It originated from an animal as large,
or possibly larger, than Tyrannosaurus rex, and thus probably represents a
new taxon for the Kirkwood fauna and the largest theropod from that fauna.
Examination of the fossil record indicates that very large theropods,
approximating the size of Tyrannosaurus rex, occurred from the Callovian
through the Maastrichtian. Such very large forms apparently evolved
sequentially in several theropod clades. 

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