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New Uintasoricine (?Primates, Plesiadapiformes) From the Earliest Bridgerian, Latest Early Eocene of Wyoming

  • Gregg F. Gunnell (a1)

Uintasoricines are diminutive plesiadapiforms that are found in the latest Paleocene through middle Eocene, predominantly in North America. They are not a diverse group but individual species may be locally abundant and they are a persistent element of the plesiadapiform radiation in North America surviving over a span of approximately 16 million years. Recent field work in southern Wyoming at South Pass has led to the discovery of a new genus and species of uintasoricine. The new form is smaller in tooth dimensions compared to other known uintasoricines, being slightly smaller than Uintasorex montezumicus from California. Both the newly described taxon and U. montezumicus are among the smallest plesiadapiforms yet known with body weights estimated to be 20 to 25 g. The sediments of the Cathedral Bluffs Tongue of the Wasatch Formation at South Pass contain a unique upland fauna—the presence of a distinctive uintasoricine in this assemblage adds further evidence to support the notion that this upland environment was a biodiversity hotspot during the latest early Eocene.

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Beard, K. C. and Dawson, M. R. 2009. Early Wasatchian mammals of the Red Hot Local Fauna, uppermost Tuscahoma Formation, Lauderdale County, Mississippi. Annals of Carnegie Museum, 78:193243.
Bown, T. M. 1982. Geology, paleontology, and correlation of Eocene volcanoclastic rocks, southeast Absaroka Range, Hot Springs County, Wyoming. United States Geological Survey Professional Paper, 1201-A:175.
Gingerich, P. D. 2001. Biostratigraphy of the continental Paleocene–Eocene boundary interval on Polecat Bench in the northern Bighorn Basin, p. 3771. InGingerich, P. D.(ed.), Paleocene–Eocene Stratigraphy and Biotic Change in the Bighorn and Clarks Fork Basins, Wyoming. University of Michigan Papers on Paleontology 33.
Gingerich, P. D., Smith, B. H., and Rosenberg, K. 1982. Allometric scaling in the dentition of primates and prediction of body weight from tooth size in fossils. American Journal of Physical Anthropology, 58:81100.
Goloboff, P. A., Farris, J. S., and Nixon, K. 2008. TNT, a free program for phylogenetic analysis. Cladistics, 24:774786.
Gunnell, G. F. 1989. Evolutionary history of Microsyopoidea (Mammalia, ?Primates) and the relationship between Plesiadapiformes and Primates. University of Michigan Papers on Paleontology, 27:1157.
Gunnell, G. F. and Bartels, W. S. 2001. Basin margins, biodiversity, evolutionary innovation, and the origin of new taxa, p. 403432. InGunnell, G. F.(ed.), Eocene Biodiversity—Unusual Occurrences and Rarely Sampled Habitats. Kluwer Academic/Plenum Publishers, New York.
Gunnell, G. F., Murphey, P. C., Stucky, R. K., Townsend, K. E. B., Robinson, P., Zonneveld, J.-P., and Bartels, W. S. 2009. Biostratigraphy and biochronology of the latest Wasatchian, Bridgerian, and Uintan North American Land Mammal “Ages”, p. 279330. InAlbright, L. B. III(ed.), Papers on Geology, Vertebrate Paleontology, and Biostratigraphy in Honor of Michael O. Woodburne. Museum of Northern Arizona Bulletin 65.
Linnaeus, C. 1758. Systema Naturae, Volume I. 10th edition, Stockholm, 824p.
Matthew, W. D. 1909. The Carnivora and Insectivora of the Bridger Basin, middle Eocene. Memoirs of the American Museum of Natural History, 9:289576.
Matthew, W. D. and Granger, W. 1921. New genera of Paleocene mammals. American Museum Novitates, 13:17.
McKenna, M. C. 1960. Fossil Mammalia from the early Wasatchian Four Mile fauna, Eocene of northwest Colorado. University of California Publications in Geological Sciences, 37:1130.
Osborn, H. F. and Wortman, J. L. 1892. Fossil mammals of the Wasatch and Wind River beds. Collected in 1891. Bulletin of the American Museum of Natural History, 4:80147.
Rose, K. D. and Bown, T. M. 1996. A new plesiadapiform (Mammalia: Plesiadapiformes) from the early Eocene of the Bighorn Basin, Wyoming. Annals of Carnegie Museum, 65:305321.
Rose, K. D., Chew, A. E., Dunn, R. H., Kraus, M. J., Fricke, H. C., and Zack, S. P. 2012. Earliest Eocene mammalian fauna from the Paleocene–Eocene Thermal Maximum at Sand Creek Divide, southern Bighorn Basin, Wyoming. University of Michigan Papers on Paleontology, 36:1122.
Silcox, M. T. 2001. A phylogenetic analysis of Plesiadapiformes and their relationship to Euprimates and other Archontans. Unpublished Ph.D. dissertation. Johns Hopkins School of Medicine, Baltimore, 728p.
Silcox, M. T. and Gunnell, G. F. 2008. Plesiadapiformes, p. 207238. InJanis, C. M.Gunnell, G. F., and Uhen, M. D.(eds.), Evolution of Tertiary Mammals of North America, Volume 2. Cambridge University Press, Cambridge.
Silcox, M. T., Rose, K. D., and Walsh, S. L. 2002. New specimens of picromomyids (Plesiadapiformes, Primates) with description of a new species of Alveojunctus. Annals of Carnegie Museum, 71:111.
Simons, E. L. 1972. Primate Evolution—An Introduction to Man's Place in Nature. The MacMillan Company, New York, New York, 322p.
Szalay, F. S. 1969. Uintasoricinae, a new subfamily of early Tertiary mammals (?Primates). American Museum Novitates, 2363:136.
Szalay, F. S. 1973. New Paleocene primates and a diagnosis of the new suborder Paromomyiformes. Folia Primatologica, 19:7387.
Szalay, F. S. 1974. A new species and genus of early Eocene primate from North America. Folia Primatologica, 22:243250.
Walsh, S. L. 1991. Eocene mammal faunas of San Diego County, p. 161178. InAbbott, P. L. and May, J. A.(eds.), Eocene Geologic History of San Diego. Pacific Section of the Society of Economic Paleontologists and Mineralogists, 68.
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Journal of Paleontology
  • ISSN: 0022-3360
  • EISSN: 1937-2337
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