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Re: Spinosaurus - the authors respond



15 m carnivores can never be common; too high up the food pyramid.

On Sun, September 21, 2014 7:52 am, Dr Ronald Orenstein wrote:
> This may be an ignorant question but: is it not true that semiaquatic
> animals are more likely, in the scheme of things, to fossilize than purely
> terrestrial ones - and if so, why is Spinosaurus so little known?  Might
> it have been genuinely rare in life?
>
> Ronald Orenstein
> 1825 Shady Creek Court
> Mississauga, ON
> Canada L5L 3W2
> ronorenstein.blogspot.com


Thomas R. Holtz, Jr.
Email: tholtz@umd.edu   Phone: 301-405-4084
Office: Centreville 1216
Senior Lecturer, Vertebrate Paleontology
Dept. of Geology, University of Maryland
http://www.geol.umd.edu/~tholtz/
Fax: 301-314-9661

Faculty Director, Science & Global Change Program, College Park Scholars
http://www.geol.umd.edu/sgc
Fax: 301-314-9843

Mailing Address:        Thomas R. Holtz, Jr.
                        Department of Geology
                        Building 237, Room 1117
                        University of Maryland
                        College Park, MD 20742 USA