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New theropod, etc.
In the mad rush to get ready for NAPC (slides are processing now:
PLEASE, turn out!!), I found myself in the U.S. Geological Survey
library. That led me to the following new papers:
Osmolksa, H. 1996. An unusual theropod dinosaur from the Late
Cretaceous Nemegt Formation of Mongolia. Acta Palaeontologica
Polonica 41: 1-38.
Abstract: An incomplete skeleton of a theropod dinosaur, _Bagaraatan
ostromi_ gen. et sp. n., was found in the Nemegt Fm. at Nemegt,
Mongolia. The mandible in _B. ostromi_ has a shallow but massive
dentary, relatively deep postdentary portion with two surangular
foramina and a somewhat elongate retroarticular process; on the ilium
there are two large depressions for muscle origins separated by a
crestlike projection; the fibula is fused distally with the
tibiotarsus and the coalesced astragalocalcaneum. _Bagaraatan_
represents the Tetanurae and displays some synapomorphies with the
Avetheropoda, however, incompleteness of the skeleton of _B. ostromi_
does not allow to determine its more precise affiliation. _Bagaraatan
was about 3.0-3.5 m long, had a relatively small head and slender hind
limbs. The presence of strongly developed hyposphenes in a long
series of anterior caudals rendered its tail only slightly flexible
Let's see: the generic name comes from the Mongolian words 'baga'
(small) and 'araatan' (predator). The trivial name is in honor of
Dr. John H. Ostrom (finally, Ostrom gets a theropod named after
him!!). The tibiotarsus, fibula, and 25 caudals are fairly complete;
the pelvis, mandible, and femur are fragmentary. That's all there is,
so far. Osmolska indicates she has yet another new theropod genus
I don't know if the following have been posted before:
An abstract only:
Coria, R.A. 1994. Sobre la presencia de dinosaurios ornitisquios
acorazados en Sudamerica. Ameghiniana 31: 398.
Notes the presence of an ankylosaur, possibly a nodosaurid, in the
lower member of the Allen Formation.
Casanovas-Cladellas, M.L., J.-V. Santafe'-Llopis & C. Santisteban-Bove'.
1995. _Dacentrurus armatus_ (Stegosauria, Dinosauria) del Creta'cio
Inferior de Los Serranos (Vaencia, Espan~a). Revista Espan~ola de
Paleontologi'a 10: 273-283.
Indicates the presence of a stegosaur assignable to _Dacentrurus
armatus_ in the locality "Cerrito del Olmo", Upper Hauterivian-Lower
That's all for now,
Thomas R. Holtz, Jr.
Vertebrate Paleontologist Webpage: http://www.geol.umd.edu
Dept. of Geology Email:email@example.com
University of Maryland Phone:301-405-4084
College Park, MD 20742 Fax: 301-314-9661
"There are some who call me... Tim."