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Re: Is Jack Horner right about T-rex?
At 07:42 PM 4/6/99 -0500, Megaraptor wrote:
>I hope he is not. T-rex was one of the top preds.(preds. is a
>abbreviation for predators) in the mid to late Cretaceous.
Two quick things (okay, three):
I) The official abbreviation of _Tyrannosaurus rex_ is _T. rex_ (no hyphen).
II) Like most carnivores, _T. rex_ almost certainly engaged in both
predation and scavenging: very few, if any, large bodied terrestrial meat
eaters are exclusively one or the other.
III) _T. rex_ is only known from the Hell Creek Formation, Lance Formation,
and equivalent-aged strata from the North American west. That makes it not
merely a Late Cretaceous form, but exclusively a *latest* Cretaceous form:
any younger, and it would be in the Cenozoic!!
Thomas R. Holtz, Jr.
Vertebrate Paleontologist Webpage: http://www.geol.umd.edu
Dept. of Geology Email:firstname.lastname@example.org
University of Maryland Phone:301-405-4084
College Park, MD 20742 Fax: 301-314-9661