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Re: Giant 'Shell Crusher' Shark Remains Found in Kansas

Nice paper, Paul, but it's about the planktivorous pachycormids
(teleosts) and not malacophagous sharks !!

The right paper is this one:

Shimada K., Everhart M. J., Decker R. & Decker P. D. 2010.
A new skeletal remain of the durophagous shark, Ptychodus mortoni,
from the Upper Cretaceous of North America: an indication of gigantic
body size.
Cretaceous Research 31 (2): 249-254.


Ptychodus mortoni Mantell is a Late Cretaceous shark that possessed
pavement-like tooth plates that were used to feed on hard-shelled
macroinvertebrates (durophagy). Here, we describe a new specimen of P.
mortoni from the Fort Hays Limestone Member of the Niobrara Chalk in
Kansas, USA, that consists of associated teeth, placoid scales, and a
portion of the right upper jaw. Although the specimen is fragmentary,
this fossil supports the previously proposed contention that P.
mortoni was a gigantic animal that likely reached at least 10 m in
total body length with an estimated jaw length of nearly 1 m.

Jocelyn Falconnet

2010/2/28 Paul Heinrich <oxytropidoceras@cox.net>:
> Giant 'Shell Crusher' Shark Remains Found in Kansas
> FOXNews.com, February 23, 2010,
> http://www.foxnews.com/scitech/2010/02/23/shell-crusher-dinosaur-terrorized-sea/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%253A+foxnews%252Fscitech+%2528Text+-+SciTech%2529
> 'Shell Crusher' Shark Swam Cretaceous Kansas
> Discovery News by Jennifer Viegas, Feb 23, 2010
> http://news.discovery.com/animals/prehistoric-shark-kansas.html
> Giant predatory shark fossil unearthed in Kansas
> BBC News by Matt Walker, Feb 24, 2010
> http://news.bbc.co.uk/earth/hi/earth_news/newsid_8530000/8530995.stm
> The paper is:
> Friedman,M.,  K. Shimada, L. D. Martin, M. J. Everhart,
> J. Liston, A. Maltese, and M. Triebold, 2010, 100-Million-
> Year Dynasty of Giant Planktivorous Bony Fishes in the
> Mesozoic Seas. Science. vol.. 327, no. 5968, pp. 990-993.
> DOI: 10.1126/science.1184743.
> http://www.sciencemag.org/cgi/content/abstract/327/5968/990
> Yours,
> Paul Heinrich
> Baton Rouge, LA
Jocelyn Falconnet