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Gut contents from a Cretaceous Tyrannosaurid: Implications for theropod dinosaur digestive tracts

Published online by Cambridge University Press:  14 July 2015

David J. Varricchio
David J. Varricchio*
Affiliation:
Museum of the Rockies, Montana State University, Bozeman 59717,
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Abstract

A partial skeleton of Daspletosaurus sp. from the Late Cretaceous (Campanian) Two Medicine Formation of western Montana preserves the first gut contents reported for a tyrannosaurid. Associated remains found with this skeleton consist of acidetched vertebrae and a fragmentary dentary from juvenile hadrosaur dinosaurs. Hadrosaur bonebed data and comparisons of hadrosaur and tyrannosaurid limb proportions suggest that juvenile hadrosaurs represented both an abundant and accessible food source. The surface corrosion exhibited by the hadrosaur elements matches that produced by stomach acids and digestive enzymes in a wide variety of living vertebrates. Based upon these and other gut contents, and also upon tooth-marked bone studies, it appears that Daspletosaurus and most theropods ingested and digested prey in a manner similar to that of extant archosaurs (crocodilians and birds), employing a two-part stomach with an enzyme-producing proventriculus followed by a thick-walled muscular gizzard. This two-part stomach appears to be an archosaur synapomorphy.

Type
Research Article
Information
Journal of Paleontology , Volume 75 , Issue 2 , March 2001 , pp. 401 - 406
Copyright
Copyright © The Paleontological Society 2001

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References

Beland, P., and Russell., D. A. 1978. Paleoecology of Dinosaur Provincial Park (Cretaceous), Alberta, interpretations fom the distribution of articulated vertebrate remains. Canadian Journal of Earth Science, 15:1012–1024.CrossRefGoogle Scholar
Bird, R. T. 1985. Bones for Barnum Brown. Texas Christian University Press, Fort Worth, 225 p.Google Scholar
Brandt, L. A. 1991. Long-term changes in a population of Alligator mississippiensis in South Carolina. Journal of Herpetology, 25:419–425.CrossRefGoogle Scholar
Brown, K. M. 1991. Mollusca: Gastropoda, p. 285–314. In Thorp, J. and Covich, A. (eds.), Ecology and Classification of North American Freshwater Invertebrates. Academic Press, San Diego, California.Google Scholar
Cannon, G. L. 1907. Sauropodian gastroliths. Science, 24:116.CrossRefGoogle Scholar
Carpenter, K. 1997a. Tyrannosauridae, p. 766–768. In Currie, P. J. and Padian, K. (eds.), Encyclopedia of Dinosaurs. Academic Press, San Diego, California.Google Scholar
Carpenter, K. 1997b. Ankylosaurs, p. 307–316. In Farlow, J. O. and Brett-Surman, M. K. (eds.), The Complete Dinosaur. Indiana University Press, Bloomington.Google Scholar
Charig, A. J., and Milner., A. C. 1997. Baryonyx walkeri, a fish-eating dinosaur from the Wealden of Surrey. Bulletin of the Natural History Museum, 53:11–70.Google Scholar
Chen, P., Dong, Z., and Zhen., S. 1998. An exceptionally well-preserved theropod dinosaur from the Yixian Formation of China. Nature, 391:147–152.CrossRefGoogle Scholar
Chin, K., Tokaryk, T. T., Erickson, G. M., and Calk., L. C. 1998. A king-sized theropod coprolite. Nature, 393:680–682.CrossRefGoogle Scholar
Colbert, E. H. 1989. The Triassic dinosaur Coelophysis . Bulletin of the Museum of Northern Arizona, 53:1–61.Google Scholar
Coombs, W. P. 1978. Theoretical aspects of cursorial adaptations in dinosaurs. Quarterly Review of Biology, 53:393–418.CrossRefGoogle Scholar
Currie, P. J., Rigby, J. K. Jr., and Sloan., R. E. 1990. Theropod teeth from the Judith River Formation of southern Alberta, Canada, p. 107–126. In Carpenter, K. and Currie, P. J. (eds.), Dinosaur Systematics: Approaches and Perspectives. Cambridge University Press, Cambridge.CrossRefGoogle Scholar
De Klerk, W. J., Forster, C. A., Sampson, S. D., Chinsamy, A., and Ross., C. F. 2000. A new carnivorous dinosaur from South Africa: the oldest coelurosaurian in Gondwana. Journal of Vertebrate Paleontology, 20(2).CrossRefGoogle Scholar
Delany, M. F., and Abercrombie., C. L. 1986. American alligator food habits in northcentral Florida. Journal of Wildlife Management, 50:348–353.CrossRefGoogle Scholar
Erickson, G. E., and Olson., K. H. 1996. Bite marks attributable to Tyrannosaurus rex, preliminary description and implications. Journal of Vertebrate Paleontology, 16:175–178.CrossRefGoogle Scholar
Erickson, G. E., Van Kirk, S. D., Su, J., Levenston, M. E., Caler, W. E., and Carter., D. R. 1996. Bite-force estimation for Tyrannosaurus rex from tooth-marked bones. Nature, 382:706–708.CrossRefGoogle Scholar
Eudes-Delongchamps, M. 1838. Mémoire sur le Poekilopleuron bucklandi, grand saurien fossile, intermédiare entre les crocodiles et les lezards. Mémoires de la Societe Linneenne de Normandie, 6:37–146.Google Scholar
Farlow, J. O. 1994. Speculations about the carrion-locating ability of tyrannosaurs. Historical Biology, 7:159–165.CrossRefGoogle Scholar
Farlow, J. O., Brinkman, D. L., Abler, W. L., and Currie., P. J. 1991. Size, shape, and serration density of theropod dinosaur lateral teeth. Modern Geology, 16:161–198.Google Scholar
Fernandez-Jalvo, Y., and Andrews., P. 1992. Small mammal taphonomy of Gran Dolina, Atapuerca (Burgos), Spain. Journal of Archaeological Science, 19:407–428.CrossRefGoogle Scholar
Fiorillo, A. R. 1991. Prey bone utilization by predatory dinosaurs. Palaeogeography, Palaeoclimatology, Palaeoecology, 88:157–166.CrossRefGoogle Scholar
Fisher, D. C. 1981. Crocodilian scatology, microvertebrate concentrations, and enamelless teeth. Paleobiology, 7:262–275.CrossRefGoogle Scholar
Galton, P. M. 1990. Basal Sauropodomorpha—prosauropods, p. 320–344. In Weishampel, D. B., Dodson, P., and Osmolska, H. (eds.), The Dinosauria. University of California Press, Berkeley.Google Scholar
Gillette, D. D. 1991. Seismosaurus halli (n. gen., n. sp.) a new sauropod dinosaur from the Morrison Formation (Upper Jurassic-Lower Cretaceous) of New Mexico, U.S.A. Journal of Vertebrate Paleontology, 11:417–433.CrossRefGoogle Scholar
Horner, J. R., and Lessem., D. 1993. The Complete T. rex . Simon and Schuster, New York, 178 p.Google Scholar
Jacobsen, A. R. 1998. Feeding behavior of carnivorous dinosaurs as determined by tooth marks on dinosaur bones. Historical Biology, 3:17–26.CrossRefGoogle Scholar
Kardong, K. V. 1998. Vertebrates: Comparative Anatomy, Function, Evolution. McGraw-Hill, Boston, Massachusetts, 747 p.Google Scholar
Kusmer, K. D. 1990. Taphonomy of owl pellet deposition. Journal of Paleontology, 64:629–637.CrossRefGoogle Scholar
Lehman, T. M., and Carpenter., K. 1990. A partial skeleton of the tyrannosaurid dinosaur Aublysodon from the Upper Cretaceous of New Mexico. Journal of Paleontology, 64:1026–1032.CrossRefGoogle Scholar
Lyman, R. L. 1994. Vertebrate Taphonomy. Cambridge University Press, Cambridge. 524 p.CrossRefGoogle Scholar
Osborn, H. F. 1924. Psittacosaurus and Protiguanodon: two Lower Cretaceous iguanodonts from Mongolia. American Museum Novitates, 127:1–16.Google Scholar
Ostrom, J. H. 1978. The osteology of Compsognatus longipes Wagner. Zitteliana, 4:73–118.Google Scholar
Qiang, J., Currie, P. J., Norrell, M. A., and Shu-An., J. 1998. Two feathered dinosaurs from northeastern China. Nature, 393:753–761.CrossRefGoogle Scholar
Rensberger, J. M., and Krentz., H. B. 1988. Microscopic effects of predator digestion on the surfaces of bones and teeth. Scanning Microscopy, 2:1541–1551.Google ScholarPubMed
Richardson, P. R. K., Mundy, P. J., and Plug., I. 1986. Bone crushing carnivores and their significance to osteodystrophy in griffon vulture chicks. Journal of the Zoological Society of London (Series A), 210:23–43.CrossRefGoogle Scholar
Rogers, R. R., Swisher, C. C., and Horner., J. R. 1993. 40Ar/39Ar age and correlation of the non-marine Two Medicine Formation (Upper Cretaceous), northwestern Montana. Canadian Journal of Earth Science, 30:1066–1075.CrossRefGoogle Scholar
Russell, D. A. 1970. Tyrannosaurs from the Late Cretaceous of western Canada. National Museum of Natural Science, Publications in Paleontology, 1:1–34.Google Scholar
Sereno, P. C. 1997. The origins and evolution of dinosaurs. Annual Review of Earth Sciences, 25:435–489.CrossRefGoogle Scholar
Skoczykas, R. 1978. Physiology of the digestive tract, p. 589–717. In Gans, C. and Gans, K. A. (eds.), Biology of the Reptilia. Volume 8. University Chicago Press, Chicago.Google Scholar
Shimada, K. 1997. Paleoecological relationships of the Late Cretaceous lamniform shark, Cretoxvrhina mantelli (Agassiz). Journal of Paleontology, 71:926–933.CrossRefGoogle Scholar
Varricchio, D. J., and Horner., J. R. 1993. Hadrosaurid and lambeosaurid bone beds from the Upper Cretaceous Two Medicine Formation of Montana: taphonomic and biologic implications. Canadian Journal of Earth Science, 30:997–1006.CrossRefGoogle Scholar
Wieland, G. R. 1906. Dinosaur gastroliths. Science, 23:819–821.CrossRefGoogle Scholar