An unusually large theropod dinosaur tooth from the Kirkwood Formation (Lower Cretaceous) of South Africa

被引：1
|
作者：
Galton, Peter M. [1 ]
Molnar, Ralph E. [2 ]
机构：
[1] Univ Bridgeport, Bridgeport, CT 06604 USA
[2] Museum No Arizona, Flagstaff, AZ 86001 USA
来源：
NEUES JAHRBUCH FUR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN | 2012年 / 263卷 / 01期
关键词：
Dinosauria; Saurischia; Theropoda; anatomy; Lower Cretaceous; South Africa; MORPHOLOGY; TANZANIA;
D O I：
10.1127/0077-7749/2011/0204
中图分类号：
Q91 [古生物学];
学科分类号：
0709 ; 070903 ;
摘要：
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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页码：17 / 23
页数：7
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