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Small theropod and bird teeth from the late Cretaceous (late Campanian) Judith River Group, Alberta

Published online by Cambridge University Press:  14 July 2015

Julia T. Sankey ,
Donald B. Brinkman ,
Merrilee Guenther  and
Philip J. Currie
Julia T. Sankey
Affiliation:
1Royal Tyrrell Museum of Paleontology, P.O. Box 7500, Drumheller, Alberta T0J 0Y0, Canada 2South Dakota School of Mines and Technology, Museum of Geology and Department of Geology and Geological Engineering, 501 E. Saint Joseph St., Rapid City 57701,
Donald B. Brinkman
Affiliation:
1Royal Tyrrell Museum of Paleontology, P.O. Box 7500, Drumheller, Alberta T0J 0Y0, Canada
Merrilee Guenther
Affiliation:
2South Dakota School of Mines and Technology, Museum of Geology and Department of Geology and Geological Engineering, 501 E. Saint Joseph St., Rapid City 57701,
Philip J. Currie
Affiliation:
1Royal Tyrrell Museum of Paleontology, P.O. Box 7500, Drumheller, Alberta T0J 0Y0, Canada
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Abstract

A collection of over 1,700 small theropod teeth from the Judith River Group (Campanian;˜79.5–74 Ma) allows our understanding of the diversity and variation of small theropods in this assemblage to be refined. In addition to the previously recognized taxa, a series of morphologically distinct groups are recognized that may represent distinct taxa in some cases. Teeth with the Paronychodon-like features of a flat surface with longitudinal ridges on one side are resolved into a few discrete morphotypes. Two of these are included in Paronychodon lacustris and two additional morphotypes are hypothesized to represent distinct taxa, here referred to as ?Dromaeosaurus morphotype A and Genus and species indet. A. The teeth of Paronychodon lacustris and ?Dromaeosaurus morphotype A share a distinctive wear pattern that suggests tooth functioning involved contact between the flat surfaces of opposing teeth. Two species of Richardoestesia, R. gilmorei and R. isosceles, are present in the assemblage. Additionally, bird teeth are identified in the assemblage and are described in this review.

Bivariate plots were used to document the variation in the theropod teeth, especially in the features that distinguish between Richardoestesia gilmorei, R. isosceles, Saurornitholestes, and Dromaeosaurus. Considerable overlap is present in all plots, so although the teeth are morphologically distinct, they are not easily distinguished by quantitative means.

Type
Research Article
Information
Journal of Paleontology , Volume 76 , Issue 4 , July 2002 , pp. 751 - 763
Copyright
Copyright © The Paleontological Society

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References

Baszio, S. 1997a. Investigations on Canadian dinosaurs: palaeoecology of dinosaur assemblages throughout the Late Cretaceous of south Alberta, Canada. Courier Forschungsinstitut Senckenberg, 196:1–31.Google Scholar
Baszio, S. 1997b. Investigations on Canadian dinosaurs: systematic palaeontology of isolated dinosaur teeth from the Latest Cretaceous of south Alberta, Canada. Courier Forschungsinstitut Senckenberg, 196:33–77.Google Scholar
Brinkman, D. B. 1990. Paleoecology of the Judith River Formation (Campanian) of Dinosaur Provincial Park, Alberta, Canada: evidence from vertebrate microfossil localities. Palaeogeography, Palaeoclimatology, Palaeoecology, 78:37–54.CrossRefGoogle Scholar
Brinkman, D. B., Ryan, M. J., and Eberth, D. A. 1998. The paleogeographic and stratigraphic distribution of ceratopsids (Ornithischia) in the upper Judith River Group of Western Canada. Palaios, 13:160–169.CrossRefGoogle Scholar
Carpenter, K. 1982. Baby dinosaurs from the Late Cretaceous Lance and Hell Creek formations and a description of a new species of theropod. Contributions to Geology, University of Wyoming, 20(2):123–134.Google Scholar
Cope, E. D. 1876. Descriptions of some vertebrate remains from the Fort Union beds of Montana. Proceedings of the Academy of Natural Sciences of Philadelphia, 248–261.Google 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. 107–125. In Carpenter, K. and Currie, P. J. (eds.), Dinosaur Systematics: Perspectives and Approaches. Cambridge University Press, Cambridge.CrossRefGoogle Scholar
Eberth, D. A. 1996. Judith River Wedge, p. 379–385. In Currie, P. J. and Padian, K. (eds.), Encyclopedia of Dinosaurs. Academic Press, San Diego.Google Scholar
Eberth, D. A., and Brinkman, D. B. 1997. Paleoecology of an estuarine, incised valley fill in the Dinosaur Park Formation (Judith River Group, Upper Cretaceous) of Southern Alberta, Canada. Palaios, 12:43–58.CrossRefGoogle Scholar
Eberth, D. A., and Hambling, A. P. 1993. Tectonic, stratigraphic, and sedimentologic significance of a regional discontinuity in the upper Judith River Group (Belly River wedge) of southern Alberta, Saskatchewan, and northern Montana. Canadian Journal of Earth Science, 30:174–200.CrossRefGoogle Scholar
Estes, R. 1964. Fossil vertebrates from the Late Cretaceous Lance Formation, Eastern Wyoming. University of California Publications in Geological Sciences, 49:1–187.Google Scholar
Fiorillo, A. R., and Currie, P. J. 1994. Theropod teeth from the Judith River Formation (Upper Cretaceous) of south-central Montana. Journal of Vertebrate Paleontology, 14:74–80.CrossRefGoogle Scholar
Fiorillo, A. R., and Gangloff, R. A. 2000. Theropod teeth from the Prince Creek Formation (Cretaceous) of Northern Alaska, with speculations on Arctic dinosaur paleoecology. Journal of Vertebrate Paleontology, 20(4):675–682.CrossRefGoogle Scholar
Gauthier, P. 1986. Saurischian monophyly and the origin of birds, p. 1–55. In Padian, K. (ed.), The Origin of Birds and the Evolution of Flight. Memoirs of California Academy of Science, 8.Google Scholar
Gilmore, G. W. 1924. A new coelurosaurid dinosaur from the Belly River Cretaceous of Alberta. Geological Survey of Canada Bulletin, 38:1–12.Google Scholar
Leidy, J. 1856. Notice of remains of extinct reptiles and fishes, discovered by Dr. F. V. Hay den in the Bad Lands of the Judith River, Nebraska Territory. Academy of Natural Sciences Philadelphia Proceedings, 8:72–73.Google Scholar
Linnaeus, C. 1758. Systema naturae per regna tria naturae, 10th edition, revised, 2 volumes. Holmiae, L. Salmii.Google Scholar
Marsh, O. C. 1881. Principal characters of American Jurassic dinosaurs. Pt. V. American Journal of Science (ser. 3), 21:417–423.CrossRefGoogle Scholar
Matthew, W. D., and Brown, B. 1922. The family Deinodontidae, with notice of a new genus from the Cretaceous of Alberta. Bulletin of the American Museum of Natural History, 46:367–385.Google Scholar
Peng, J.-H., Russell, A. P., and Brinkman, D. B. 2001. Vertebrate microsite assemblages (exclusive of mammals) from the Foremost and Oldman Formations of the Judith River Group (Campanian) of Southeastern Alberta: an illustrated guide. The Provincial Museum of Alberta, Natural History Occasional Paper No. 25, 54 p.Google Scholar
Rowe, T., Ciffelli, R. L., Lehman, T. M., and Weil, A. 1992. The Campanian Terlingua local fauna, with a summary of other vertebrates from the Aguja Formation, Trans-Pecos, Texas. Journal of Vertebrate Paleontology, 12:472–493.CrossRefGoogle Scholar
Russell, L. S. 1935. Fauna of the Upper Milk River beds, Southern Alberta. Transactions, Royal Society of Canada, 3(29):115–127.Google Scholar
Ryan, M. J., Currie, P. J., Gardner, J. D., Vickaryous, M. K., and Lavigne, J. M. 1998. Baby hadrosaurid material associated with an unusually high abundance of Troodon teeth from the Horseshoe Canyon Formation, Upper Cretaceous, Alberta, Canada. Gaia 15:123–133.Google Scholar
Sankey, J. T. 1998. Vertebrate paleontology and magnetostratigraphy of the upper Aguja Formation (late Campanian), Talley Mountain area, Big Bend National Park, Texas. Ph.D. dissertation, Louisiana State University, Baton Rouge, 263 p.Google Scholar
Sankey, J. T. 2001. Late Campanian southern dinosaurs, Aguja Formation, Big Bend, Texas. Journal of Paleontology, 75(1):208–215.CrossRefGoogle Scholar
Sankey, H. G. 1888. The classification of the Dinosauria. Report British Association for the Advancement of Science, 1887:698–699.Google Scholar
Sues, H.-D. 1978. A new small theropod dinosaur from the Judith River Formation (Campanian) of Alberta Canada. Zoological Journal of the Linnean Society, 62:381–400.CrossRefGoogle Scholar
Tokaryk, T. T., and Harington, D. R. 1992. Baptornis sp. (Aves: Hespernithiformes) from the Judith River Formation (Campanian) of Saskatchewan, Canada. Journal of Paleontology, 66:1010–1012.CrossRefGoogle Scholar
Xu, X., Zhonghe, Z., and Xiaolin, W. 2000. The smallest known non-avian theropod dinosaur. Nature, 408:705–708.CrossRefGoogle ScholarPubMed