Journal
JOURNAL OF PALEONTOLOGY
Volume 82, Issue 6, Pages 1127-1138Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1666/06-107.1
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Funding
- Jurassic Foundation
- Department of Geosciences at Texas Tech University
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A bone bed in the middle part of the Javelina Formation (Maastrichtian) in Texas yielded parts of about 37 identifiable ceratopsid dinosaur bones. mostly appendicular and limb girdle elements belonging to One juvenile and two adult individuals of Torosaurus of, utahensis, The bone bed is a lag assemblage comprising large immobile parts of the skeletons accumulated in an abandoned stream channel. In general form and proportion,, the postcranial bones are similar to those in Pentaceratops sternbergi and are not as robust as those in Torosaurus latus or Triceratops horridus. A few cranial elements are preserved, including parts of a parietal, squamosal. maxilla, and two dentaries. The form of the parietal fragment is comparable to that of a more nearly complete specimen of Torosaurus of. utahensis collected nearby at about the same stratigraphic level. The bone bed material provides a basis for the first skeletal reconstruction of this enigmatic horned dinosaur. Most character,, used in diagnoses of T. utahensis and T. latus are inadequate. Only the raised bar along the squamosal/parietal suture, present in T latus; and the midline epiparietal, absent in T. latus, may discriminate the two species.
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