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A gigantic skull and skeleton of the horned dinosaur Pentaceratops sternbergi from New Mexico

  • Thomas M. Lehman (a1)
Abstract

An exceptionally large skeleton of Pentaceratops sternbergi (Ornithischia:Ceratopsia) provides for the first time an accurate impression of the body proportions in this horned dinosaur. This is the only known specimen with a skull associated with most of the postcranial skeleton. The restored skull is nearly three meters in length and is thus the largest of any ceratopsian and the largest skull thus far known in any terrestrial vertebrate. The elongate rostrum, elaborate premaxillary structure, and complex frontal and cornual sinuses demonstrate a high level of intraspecific variability in these features. Such features are therefore likely not useful in providing species-level discrimination in other chasmosaurines. The function of the intricate chasmosaurine premaxillary narial structures is probably associated with an advanced level of herbivory.

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Alexander, R. M. 1989. Dynamics of Dinosaurs and Other Extinct Giants. Columbia University Press, New York, 167 p.
Anderson, J. F., Hall-Martin, A., and Russell, D. A. 1985. Longbone circumference and weight in mammals, birds and dinosaurs. Journal of the Zoological Society of London, 207:5361.
Burt, W. H., and Grossenheider, R. P. 1976. A Field Guide to the Mammals. Houghton Mifflin, Boston, 289 p.
Christian, A., and Preuschoft, H. 1996. Deducing the body posture of extinct large vertebrates from the shape of the vertebral column. Palaeontology, 39:801812.
Colbert, E. H., and Bump, J. D. 1947. A skull of Torosaurus from South Dakota and a revision of the genus. Proceedings of the Academy of Natural Sciences of Philadelphia, 99:93106.
Coombs, W. P. 1978. Forelimb muscles of the Ankylosauria (Reptilia, Ornithischia). Journal of Paleontology, 52:642657.
Coombs, W. P., and Maryanska, T. 1990. Ankylosauria, p. 456483. In Weishampel, D. B., Dodson, P., and Osmolska, H. (eds.), The Dinosauria. University of California Press, Berkeley.
Dodson, P. 1976. Quantitative aspects of relative growth and sexual dimorphism in Protoceratops. Journal of Paleontology, 50:929940.
Dodson, P. 1996. The Horned Dinosaurs. Princeton University Press, New Jersey, 346 p.
Dodson, P., and Currie, P. J. 1990. Neoceratopsia, p. 593618. In Weishampel, D. B., Dodson, P., and Osmolska, H. (eds.), The Dinosauria. University of California Press, Berkeley.
Dodson, P., and Farlow, J. O. 1996. Posture of ceratopsids—a solution at last, or is it, p. 45. In Wolberg, D. and Stump, E. (eds.), Dinofest International, Symposium Program and Abstracts, Arizona State University.
Estes, R. D. 1991. The Behavior Guide to African Mammals. University of California Press, Berkeley, 611 p.
Forster, C. A. 1996a. New information on the skull of Triceratops. Journal of Vertebrate Paleontology, 16:246258.
Forster, C. A. 1996b. Species resolution in Triceratops: cladistic and morphometric approaches. Journal of Vertebrate Paleontology, 16:259270.
Forster, C. A., Sereno, P. C., Evans, T. W., and Rowe, T. 1993. A complete skull of Chasmosaurus mariscalensis (Dinosauria:Ceratopsidae) from the Aguja Formation (Late Campanian) of West Texas. Journal of Vertebrate Paleontology, 13:161170.
Gilmore, C. W. 1906. The mounted skeleton of Triceratops prorsus. U. S. National Museum Proceedings, 29:433435.
Godfrey, S. J., and Holmes, R. 1995. Cranial morphology and systematics of Chasmosaurus (Dinosauria:Ceratopsidae) from the Upper Cretaceous of western Canada. Journal of Vertebrate Paleontology, 15:726742.
Hatcher, J. B., Marsh, O. C., and Lull, R. S. 1907. The Ceratopsia. U.S. Geological Survey Monograph 49, 300 p.
Lambe, L. M. 1915. On Eoceratops canadensis, gen. nov., with remarks on other genera of Cretaceous horned dinosaurs. Canadian Geological Survey Museum Bulletin 12, Geology Series number 24:149.
Langston, W. Jr. 1989. A history of vertebrate paleontology at the University of Oklahoma. Unpublished report, Oklahoma Museum of Natural History, 92 p.
Lehman, T. M. 1981. The Alamo Wash local fauna: a new look at the old Ojo Alamo fauna, p. 189221. In Lucas, S., Rigby, K., and Kues, B. (eds.), Advances in San Juan Basin Paleontology. University of New Mexico Press, Albuquerque.
Lehman, T. M. 1990. The ceratopsian subfamily Chasmosaurinae: sexual dimorphism and systematics, p. 211229. In Carpenter, K. and Currie, P. (eds.), Dinosaur Systematics: Perspectives and Approaches. Cambridge University Press, New York.
Lehman, T. M. 1993. New data on the ceratopsian dinosaur Pentaceratops sternbergii Osborn from New Mexico. Journal of Paleontology, 67:279288.
Lehman, T. M. 1996. A horned dinosaur from the El Picacho Formation of West Texas, and a review of ceratopsian dinosaurs from the American Southwest. Journal of Paleontology, 70:494508.
Lehman, T. M. 1997. Campanian dinosaur biogeography in the western interior of North America, p. 223240. In Wolberg, D. and Stump, E. (eds.), Dinofest International, Proceedings of a symposium sponsored by Arizona State University. Special Publication, Academy of Natural Sciences, Philadelphia.
Lull, R. S. 1933. A revision of the Ceratopsia or horned dinosaurs. Yale Peabody Museum, Memoir 3:1175.
Marsh, O. C. 1888. A new family of horned Dinosauria from the Cretaceous. American Journal of Science, 36:477478.
Mayr, E. 1969. Principles of Systematic Zoology. McGraw-Hill, New York, 428 p.
Nowak, R. M., and Paradiso, J. L. 1983. Walker's Mammals of the World, 4th Edition. Johns Hopkins University Press, Baltimore, 1362 p.
Osborn, H. F. 1923. A new genus and species of Ceratopsia from New Mexico, Pentaceratops sternbergi. American Museum of Natural History Novitates, 93:13.
Osborn, H. F. 1933. Mounted skeleton of Triceratops elatus. American Museum of Natural History Novitates, 654:113.
Ostrom, J. H., and Welnhofer, P. 1990. Triceratops, an example of flawed systematics, p. 245254. In Carpenter, K. and Currie, P. (eds.), Dinosaur Systematics: Perspectives and Approaches. Cambridge University Press, New York.
Packer, C. 1983. Sexual dimorphism: the horns of African antelopes. Science, 221:11911193.
Parsons, T. S. 1970. The nose and Jacobson's Organ, p. 99191. In Gans, C. and Parsons, T. S. (eds.) Biology of the Reptilia, Volume 2, Academic Press, London.
Rigby, J. K. Jr., and Wolberg, D. L. 1987. The therian mammalian fauna (Campanian) of quarry 1, Fossil Forest study area, San Juan Basin, New Mexico. Geological Society of America Special Paper, 209:5179.
Romer, A. S. 1956. Osteology of the Reptiles. University of Chicago Press, Chicago, 772 p.
Rowe, T., Colbert, E. H., and Nations, J. D. 1981. The occurrence of Pentaceratops (Ornithischia: Ceratopsia) with a description of its frill, p. 2948. In Lucas, S., Rigby, K., and Kues, B. (eds.), Advances in San Juan Basin Paleontology. University of New Mexico Press, Albuquerque.
Weishampel, D. B. 1981. The nasal cavity of lambeosaurine hadrosaurids (Reptilia:Ornithischia): comparative anatomy and homologies. Journal of Paleontology, 55:10461057.
Weishampel, D. B. 1984. Evolution of jaw mechanisms in ornithopod dinosaurs. Advances in Anatomy, Embryology, and Cell Biology, 87:1110.
Weishampel, D. B., and Horner, J. R. 1990. Hadrosauridae, p. 534561. In Weishampel, D. B., Dodson, P., and Osmolska, H. (eds.), The Dinosauria. University of California Press, Berkeley.
Wiman, C. 1930. Über Ceratopsia aus der oberen Kreide in New Mexico. Nova Acta Regiae Societatis Scientiarum Upsaliensis series 4, 7:119.
Wolberg, D. L., Hall, J. P., Bellis, D., Chavez, W. X., Anderson, O., Moro, R., and Gil, A. 1988. Regional historic, stratigraphic, and paleontologic framework of the Late Cretaceous (Campanian-Maastrichtian) Fossil Forest locality near Split Lip Flats, San Juan Basin, San Juan County, New Mexico. New Mexico Bureau of Mines and Mineral Resources Bulletin, 122:721.
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Journal of Paleontology
  • ISSN: 0022-3360
  • EISSN: 1937-2337
  • URL: /core/journals/journal-of-paleontology
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