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Re: Idaho Cretaceous dinosaur site + other news

From: Ben Creisler

In case people could not read the reply to Tom's question about
spinosaurid teeth...

From:  ljkrumenacker@yahoo.com

I wouldn't be willing to go that far on these isolated teeth
unfortunately. They suggest piscivory to me from the overall
morphology but are significantly different from definitive spinosaur
teeth that have actually been found in jaws, with postcranial remains,
etc. I hope to find more theropod bones at the site this season to
maybe get a better idea as to the owner of these teeth.

L.J. Krumenacker
Paleontologist PhD Candidate: Montana State University, Traphagen Hall 207


For a few photos of the dig and finds, see:


On Wed, May 21, 2014 at 5:35 PM, Thomas R. Holtz, Jr. <tholtz@umd.edu> wrote:
> Could this be the long-awaited North American spinosaurid?!?!?
> On Wed, May 21, 2014 5:41 pm, Ben Creisler wrote:
>> From: Ben Creisler
>> bcreisler@gmail.com
>> Some recent news items:
>> Idaho dinosaur site found
>> http://www.kbzk.com/news/msu-paleontologists-discover-the-most-diverse-dinosaur-fossil-site-yet-found-in-idaho/
>> Link to Rocky Mountain and Cordilleran sections of Geological Society
>> of America conference abstract:
>> https://gsa.confex.com/gsa/2014RM/webprogram/Paper238289.html
>> Extract:
>> Theropods are represented by enigmatic teeth of a large, possibly
>> piscivorous theropod, and teeth of 2 smaller uncertain forms; as well
>> as isolated vertebrae, one of which suggest a possible neovenatorid
>> allosauroid. Armor scutes and teeth indicate the presence of an
>> ankylosaur. The ornithopod Oryctodromeus, which dominates the fossil
>> assemblage of the Wayan, is well-represented by a tooth and numerous
>> bones. A hadrosaurid is known from one tooth. Eggshell of the oogenus
>> Macroelongatoolithus (probably representing a large oviraptorid) is
>> common. Mammals include a non-cimolodontan multituberculate as well as
>> a possible triconodontid. Turtles, fish, crocodilians, and possible
>> lizards are represented by isolated remains.
>> Though the nature of the construction and heavy soil cover did not
>> allow detailed observations, the lithology suggests the deposit is a
>> fluvial lag. Varying degrees of taphonomic modification are indicated
>> by a mixture of delicate elements such as an Oryctodromeus dentary
>> retaining fully erupted teeth, broken limb shafts missing ends, and
>> unidentifiable rounded and abraded bone fragments. Except for a few
>> articulated Oryctodromeus caudal vertebrae with ossified tendons, all
>> fossil bones are isolated and unassociated. These observations suggest
>> that the deposit is a significantly time-averaged accumulation
>> partially sourced from upstream floodplains proximal to the fluvial
>> system. Having produced remains from at least 4 kinds of theropods, 3
>> types of ornithischians, 1 or more types of mammals, and aquatic
>> vertebrates, this locality easily represents the most significant
>> vertebrate fossil locality in the Wayan Formation. Many fossils await
>> preparation and collection of fossils from stockpiled matrix in the
>> field will continue in 2014.
>> Other Mesozoic presentations:
>> https://gsa.confex.com/gsa/2014RM/webprogram/Session34609.html
>> ==
>> Scotland fossils threatened
>> http://www.bbc.com/news/uk-scotland-highlands-islands-27484648
>> ==
>> Mary Anning quiz
>> http://www.mirror.co.uk/news/uk-news/mary-anning-take-dinosaur-quiz-3580752
>> ===
>> In Chinese:
>> New  Shanxi Geological Museum in China-- "treasure" is specimen of
>> Triassic archosaur Shansisuchus (bottom photo)
>> http://roll.sohu.com/20140517/n399682378.shtml
> 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