Publications

Peer-reviewed Journal Articles

Yapuncich, G. S., Chester, S. G. B., Bloch, J. I., Boyer, D. M. In press. The Feet of Paleogene Primates. In: The Evolution of the Primate Foot: Perspectives from Anatomical, Developmental, Functional, and Paleontological Evidence. Eds: Angel Zeininger, Kevin Hatala, Roshna Wunderlich, Daniel Schmitt. Springer Publishing, New York.

Bertrand, O. C., Shelley, S. L., Williamson, T. E., Wible, J. R., Chester, S. G. B., Flynn, J. J., Holbrook, L. T., Lyson, T. R., Meng, J., Miller, I. M., Puschel, H. P., Smith T., Spaulding, M., Tseng, Z. J., Brusatte, S. L. 2022. Brawn before brains in placental mammals after the end-Cretaceous extinction. Science 376:80-85.


Read more about mammals and brain evolution

Krause, D. W., Hoffmann, S., Lyson, T. R., Dougan, L. G., Petermann, H., Tecza, A., Chester, S. G. B., Miller, I. M. 2021. New skull material of Taeniolabis taoensis (Multituberculata, Taeniolabidadae) from the early Paleocene (Danian) of the Denver Basin, Colorado. Journal of Mammalian Evolution 28:1083-1143.

Hughes, J. J., Berv, J. S., Chester, S. G. B., Sargis, E. J., Field, D. J. 2021. Ecological selectivity and the evolution of mammalian substrate preference across the K-Pg boundary. Ecology and Evolution 11:14540-14554.


Read more about ecological selectivity

*Wilson Mantilla, G. P., *Chester, S. G. B., Clemens, W. A., Moore, J. R., Sprain, C. J., Hovatter, B. T., Mitchell, W. S., Mans, W. W., Mundil, R., Renne, P. R. 2021. Earliest Palaeocene purgatoriids and the initial radiation of stem primates. Royal Society Open Science 8: 210050. *Authors contributed equally to this study.


Read more about the earliest primates

Selig, K. R., Sargis, E. J., Chester, S. G. B., Silcox, M. T. 2020. Using three-dimensional geometric morphometric and dental topographic analyses to infer the systematics and paleoecology of fossil treeshrews (Mammalia, Scandentia). Journal of Paleontology 94:1202-1212.

Chester, S. G. B., Sargis, E. J. 2020. Pan-Primates. In K. de Queiroz, P. D. Cantino, J. A. Gauthier (eds.), Phylonyms: A Companion to the PhyloCode, CRC Press. pp. 903-906.

Weiss, K. R., Chester, S. G. B., Olson, L. E., Sargis, E. J. 2020. Postcranial skeletal variation in pencil-tailed tree mice (Rodentia: Muridae: Chiropodomys): functional, ecogeographic, and taxonomic implications. Bulletin of the Peabody Museum of Natural History 61:23-40.

Bertrand, O. C., Shelley, S. L., Wible, J. R., Williamson, T. E., Holbrook, L. T., Chester, S. G. B., Butler, I. B., Brusatte, S. L. 2020. Virtual endocranial and inner ear endocasts of the Paleocene ‘condylarth’ Chriacus: new insight into the neurosensory system and evolution of early placental mammals. Journal of Anatomy 236:21-49. (Cover Article)

Lyson, T. R., Miller, I. M., Bercovici, A. D., Weissenburger, K., Fuentes, A. J., Clyde, W. C., Hagadorn, J. W., Butrim, M. J., Johnson, K. R., Fleming, R. F., Barclay, R. S., Maccracken, S. A., Lloyd, B., Wilson, G. P., Krause, D. W., Chester, S. G. B. 2019. Exceptional continental record of biotic recovery after the Cretaceous-Paleogene mass extinction. Science 366:977-983.


Read more about mammalian recovery

Morse, P. E., Chester, S. G. B., Boyer, D. M., Smith, T., Smith, R., Gigase, P., Bloch, J. I. 2019. New fossils, systematics, and biogeography of the oldest known crown primate Teilhardina from the earliest Eocene of Asia, Europe, and North America. Journal of Human Evolution 128:103-131.


Read more about the oldest euprimates

Chester, S. G. B., Williamson, T.E., Silcox, M. T., Bloch, J. I., Sargis, E. J. 2019. Skeletal  morphology of Torrejonia wilsoni (Euarchonta, Palaechthonidae). Journal of Human Evolution 128:76-92.

Silcox, M. T., Bloch, J. I., Boyer, D. M., Chester, S. G. B., Lopez-Torres, S. 2017. The evolutionary radiation of plesiadapiforms. Evolutionary Anthropology 26:74-94.

Chester, S. G. B., Williamson, T. E., Bloch, J. I., Silcox, M. T., Sargis, E. J. 2017. Oldest skeleton of a plesiadapiform provides additional evidence for an exclusively arboreal radiation of stem primates in the Palaeocene. Royal Society Open Science 4: 170329.


Read more about the oldest known plesiadapiform skeleton

Boyer, D. M., Yapuncich, G. S., Chester, S. G. B., Bloch, J. I., Godinot, M. 2016. Hands of Paleogene primates. In The Evolution of the Primate Hand: Anatomical, Developmental, Functional, and Paleontological Evidence. Kivell, T.L., Lemelin, P., Richmond, B.G., Schmitt, D. (eds). Springer Publishing, New York. pp. 373-419.

Bloch, J. I., Chester, S. G. B., Silcox, M. T. 2016. Cranial anatomy of Paleogene Micromomyidae and implications for early primate evolution. Journal of Human Evolution 96:58-81.

Chester, S. G. B., Bloch, J. I., Boyer, D. M., Clemens, W. A. 2015. Oldest known euarchontan tarsals and affinities of Paleocene Purgatorius to Primates. Proceedings of the National Academy of Sciences 112:1487-1492.


Read more about Purgatorius

Manz, C. L., Chester, S. G. B., Bloch, J. I., Silcox, M. T., Sargis, E. J. 2015. New partial skeletons of Palaeocene Nyctitheriidae and evaluation of proposed euarchontan affinities. Biology Letters 11:20140911.

Granatosky, M. C., Lemelin, P., Chester, S. G. B., Pampush, J. D., Schmitt, D. 2014. Functional and evolutionary aspects of axial stability in euarchontans and other mammals. Journal of Morphology 275:313-327.

Chester, S. G. B., Bloch, J. I. 2013. Systematics of Paleogene Micromomyidae (Euarchonta, Primates) from North America. Journal of Human Evolution 65:109-142.

Boyer, D. M., Yapuncich, G. S., Chester. S. G. B., Bloch, J. I., Godinot, M. 2013. Hands of early primates. Yearbook of Physical Anthropology 57:33-78. (Cover Article)

Chester, S. G. B., Beard, K. C. 2012. New micromomyid plesiadapiforms (Mammalia, Euarchonta) from the late Paleocene of Big Multi Quarry, Washakie Basin, Wyoming. Annals of Carnegie Museum 80:159-172.

Secord, R., Bloch, J. I., Chester, S. G. B., Boyer, D. M., Wood, A. R., Wing, S. L., Kraus, M. J., McInerney, F. A., Krigbaum, J. 2012. Evolution of the earliest horses driven by climate change in the Paleocene-Eocene Thermal Maximum. Science 335:959-962.


Read more about Sifrhippus sandrae and climate change

Pointer, M. A., Kamilar, J. M., Warmuth, V., Chester, S. G. B., Delsuc, F., Mundy, N. I., Asher, R. J., Bradley, B. J. 2012. RUNX2 tandem repeats and the evolution of facial length in placental mammals. BMC Evolutionary Biology 12:103.

Chester, S. G. B., Sargis, E. J., Szalay, F. S., Archibald, J. D., Averianov, A. O. 2012. Therian femora from the Late Cretaceous of Uzbekistan. Acta Palaeontologica Polonica 57:53-64.

Rose, K. D., Chester, S. G. B., Dunn, R. H., Boyer, D. M., Bloch, J. I. 2011. New Fossils of the oldest North American Euprimate Teilhardina brandti (Omomyidae) from the Paleocene-Eocene Thermal Maximum. American Journal of Physical Anthropology 146:281-305.


Read more about the earliest evidence of nails in euprimates

Lyson, T. R., Bercovici, A., Chester, S. G. B., Sargis, E. J., Pearson, D., Joyce, W. G. 2011. Dinosaur extinction: closing the ‘3 m gap’. Biology Letters 7:925-928.


Read more about this study. This find was ranked #35 for 2011 by Discover Magazine

Chester, S. G. B., Sargis, E. J., Szalay, F. S., Archibald, J. D., Averianov, A. O. 2010. Mammalian distal humeri from the Late Cretaceous of Uzbekistan. Acta Palaeontologica Polonica 55:199-211.

Chester, S. G. B., Bloch, J. I., Secord, R., Boyer, D. M. 2010. A new small bodied species of Palaeonictis (Creodonta, Oxyaenidae) from the Paleocene-Eocene Thermal Maximum. Journal of Mammalian Evolution 17:227-243.


Read more about climate change

Published Abstracts and Conference Presentations

Bertrand, O. C., Shelley, S. L., Williamson, T. E., Wible, J. R., Chester, S. G. B., Flynn, J. J., Holbrook, L. T., Lyson, T. R., Meng, J., Miller, I. M., Puschel, H. P., Smith T., Spaulding, M., Tseng, Z. J., Brusatte, S. L. The emergence and early diversification of the placental mammal brain. Presented at the 2022 European Association of Vertebrate Paleontologists Conference in Benevento, Italy.

López-Torres, S., Selig, K. R., Boyer, D. M., Burrows, A. M., Chester. S. G. B., Smith, T., Silcox, M. T. 2022. Gouging behaviour in plesiadapiforms: insights from the distribution of enamel thickness in incisors of close euprimate relatives. Presented at the 2022 International Primatological Society conference in Quito, Ecuador.

Hovatter, B. T., Chester, S. G. B., Wilson Mantilla, G. P. 2021. New records of earliest Torrejonian (To1) plesiadapiforms from northeastern Montana, USA, provide window into the early diversification of stem primates. Journal of Vertebrate Paleontology, Program and Abstracts, 144. Presented at the virtual 2021 Society of Vertebrate Paleontology Conference.

Hughes, J. J., Berv, J. S., Chester, S. G. B., Sargis, E. J., Field, D. J. Ecological selectivity and evolution of mammalian arboreality across the K-Pg boundary. Presented at the virtual 2021 Annual Meeting of the American Society of Mammalogists.

Bertrand, O. C., Brusatte, S. L., Shelley, S. L., Wible, J. R., Williamson, T. E., Chester, S. G. B., Holbrook, L. T., Lyson, T.R., Smith T., Meng, J. 2020. Brain evolution of early placental mammals: The impact of the end-Cretaceous mass extinction on the neurosensory system of our distant relatives. Journal of Vertebrate Paleontology, Program and Abstracts, 75. Presented at the virtual 2020 Society of Vertebrate Paleontology Conference.

Hughes, J. J., Berv, J. S., Chester, S. G. B., Sargis, E. J., Field, D. J. 2020. Evolution of mammalian arboreality and the K-Pg mass extinction. Journal of Vertebrate Paleontology, Program and Abstracts, 184. Presented at the virtual 2020 Society of Vertebrate Paleontology Conference.

Krause, D. W., Chester, S. G. B., Hoffmann, S., Lyson, T. R., Dougan, L. G., Petermann, H., Tecza, A., Miller, I. M. 2020. New skull material of Taeniolabis taoensis (Multituberculata, Taeniolabididae): implications for taeniolabidid anatomy, paleobiology, and phylogenetic relationships. Journal of Vertebrate Paleontology, Program and Abstracts, 211. Presented at the virtual 2020 Society of Vertebrate Paleontology Conference.

Chester, S. G. B., Wilson, G. P., Lyson, T. R., Sargis, E. J. 2020. Discovery of early Paleocene Purgatorius from a new fossil locality in the Fort Union Formation of southeastern Montana, USA. American Association of Physical Anthropology Supplement 69:49. Annual meeting of the American Association of Physical Anthropologists in Los Angeles, CA, canceled due to COVID-19.

Crowell, J. W., Wible, J. R., Chester, S. G. B. 2020. Petrosal morphology of Paleocene Zanycteris paleocenus and the relationship of picrodontids to plesiadapiforms. American Association of Physical Anthropology Supplement 69:61. Annual meeting of the American Association of Physical Anthropologists in Los Angeles, CA, canceled due to COVID-19.

Bertrand, O. C., Brusatte, S. L., Shelley, S. L., Wible, J. R., Williamson, T. E., Holbrook, L. T., Chester, S. G. B., Smith T., Butler, I. B., Meng, J. 2019. First virtual endocasts of two Paleocene arctocyonids: A glimpse into the behavior of early placental mammals after the end-Cretaceous extinction. Journal of Vertebrate Paleontology, Program and Abstracts, 63. Presented at the 2019 Society of Vertebrate Paleontology Conference in Brisbane, Australia.

Bertrand, O. C., Brusatte, S. L., Shelley, S. L., Wible, J. R., Williamson, T. E., Holbrook, L. T., Chester, S. G. B., Smith T., Butler, I. B., Meng, J. 2019. First virtual endocasts of two Paleocene arctocyonids Arctocyon and Chriacus: Insight into the behavior of early placental mammals after the end-Cretaceous mass extinction. Presented at the 2019 International Symposium: Evolution and Paleoenvironment of Early Modern Vertebrates during the Paleogene in Brussels, Belgium.

Weiss, K. R., Chester, S. G. B., Olsen, L. E., Sargis, E. J. 2019. Functional skeletal morphology of pencil-tailed tree mice (Rodentia: Muridae: Chiropodomys). Presented at the 2019 Annual Meeting of the American Society of Mammalogists in Washington, DC.

Chester, S. G. B., Bloch, J. I., Boyer, D. M., Sargis, E. J. 2018. Hind limb morphology of Paleogene micromomyid plesiadapiforms (Euarchonta, Primates). Journal of Vertebrate Paleontology, Program and Abstracts, 105. Presented at the 2018 Society of Vertebrate Paleontology Conference in Albuquerque, NM.

Ermer, H. W., Sargis, E. J., Wilson, G. P., Lyson, T. R., Chester, S. G. B. 2018. Earliest Paleocene multituberculates from the Camel Butte locality of the Fort Union Formation, southeastern Montana. Journal of Vertebrate Paleontology, Program and Abstracts, 122-123. Presented at the 2018 Society of Vertebrate Paleontology Conference in Albuquerque, NM.

Holbrook, L. T., Chester, S. G. B., Paparo, S. M. 2018. Investigations of the skeleton of Meniscotherium (Mammalia) and its phylogenetic implications using micro-CT. Journal of Vertebrate Paleontology, Program and Abstracts, 148. Presented at the 2018 Society of Vertebrate Paleontology Conference in Albuquerque, NM.

Sargis, E. J., Chester, S. G. B., Bloch, J. I., Silcox, M. T., Williamson, T. E. 2018. Functional morphology of a remarkably complete skeleton of Mixodectes pungens: Evidence for arboreality in an enigmatic eutherian from the early Paleocene. Journal of Vertebrate Paleontology, Program and Abstracts, 210. Presented at the 2018 Society of Vertebrate Paleontology Conference in Albuquerque, NM.

Selig, K. R., Sargis, E. J., Chester, S. G. B., Silcox, M. T. 2018. Three-dimensional geometric morphometric analysis of treeshrew lower molars: dental morphology of the extinct Prodendrogale yunnanica (Scandentia, Tupaiidae). Journal of Vertebrate Paleontology, Program and Abstracts, 213. Presented at the 2018 Society of Vertebrate Paleontology Conference in Albuquerque, NM.

Pampush, J. D., Morse, P. E., Chester, S. G. B., Spradley, J. P., Williams, B. A., Glander, K. E., Teaford, M. F., Kay, R. F. 2018. Dental Topography and Food Processing in Wild-Caught Costa Rican Alouatta. American Journal of Physical Anthropology165:199. Presented at the 2018 American Association of Physical Anthropology conference in Austin, TX.

Chester, S. G. B., Beard, K. C., Ni, X., Tong, Y., Wang, J. 2017. New primitive micromomyid plesiadapiform from the Wutu Formation, Shandong Province, China. American Journal of Physical Anthropology 162, S64:141. Presented at the 2017 American Association of Physical Anthropology conference in New Orleans, LA.

Morse, P. E., Chester, S. G. B., Boyer, D. M., Bloch, J. I. 2016. Morphological variation in the oldest North American euprimate Teilhardina brandti, and its implications for early primate evolution. Journal of Vertebrate Paleontology, Program and Abstracts, 192. Presented at the 2016 Society of Vertebrate Paleontology Conference in Salt Lake City, UT.­­

Bloch, J. I., Chester, S. G. B., Holroyd, P. A. 2015. Postcranial morphology of early Eocene Choctawius gives new insight on the relationship of microsyopids to other euarchontans. Journal of Vertebrate Paleontology, Program and Abstracts, 91. Presented at the 2015 Society of Vertebrate Paleontology Conference in Dallas, TX.

Chester, S. G. B., Sargis, E. J., Bloch, J. I., Boyer, D.M. 2015. Partial skeleton of early Eocene Tinimomys graybulliensis (Primates, Micromomyidae) from the Clarks Fork Basin, Wyoming. American Journal of Physical Anthropology Supplement 60:104. Presented at the 2015 American Association of Physical Anthropology conference in St. Louis, MO.

Chester, S. G. B., Sargis, E. J., Cohron, C. N., Hunter, J. P., Lyson, T. R. 2014. New species of Mimatuta (“Condylarthra,” Periptychidae) from the earliest Paleocene of Montana. Journal of Vertebrate Paleontology, Program and Abstracts, 108. Presented at the 2014 Society of Vertebrate Paleontology Conference in Berlin, Germany.

Bloch, J. I., Morse, P., Bourque, J. R., Boyer, D. M., Chester, S. G. B., Secord, R. 2014. Oldest North American record of the giant flightless bird Diatryma (Gastornis) from the Paleocene-Eocene Thermal Maximum. Journal of Vertebrate Paleontology, Program and Abstracts, 93. Presented at the 2014 Society of Vertebrate Paleontology Conference in Berlin, Germany.

Secord, R., Bloch, J. I., Boyer, D. M., Chester, S. G. B., Morse, P., Krigbaum, J. 2014. Mammalian paleoecology through the Paleocene-Eocene Thermal Maximum: an isotopic perspective. Presented at the 2014 Geological Society of America North-Central Meeting in Lincoln, NE.

Chester, S. G. B., Sargis, E. J., Bloch, J. I., Boyer, D.M. 2013. Nearly complete skeleton of early Eocene Tinimomys graybulliensis (Primates, Micromomyidae). Journal of Vertebrate Paleontology, Program and Abstracts, 104. Presented at the 2013 Society of Vertebrate Paleontology Conference in Los Angeles, CA.

Secord, R., Bloch, J. I., Boyer, D. M., Chester, S. G. B., Morse, P., Krigbaum, J. 2013. Stable isotope paleoecology and vegetation structure during the Paleocene-Eocene Thermal Maximum from mammalian tooth enamel. Presented at the 2013 Geological Society of America Annual Meeting in Denver, CO.

Chester, S. G. B., Bloch, J. I., Clemens, W. A. 2013. First known tarsals of the earliest primate Purgatorius. American Journal of Physical Anthropology 150, S56: 97-98. Presented at the 2013 American Association of Physical Anthropologists Annual Meeting in Knoxville, TN.

Chester, S. G. B., Bloch, J. I., Clemens, W. A. 2012. Tarsal morphology of the oldest plesiadapiform Purgatorius indicates arboreality in the earliest primates. Journal of Vertebrate Paleontology, Program and Abstracts, 77. Presented at the 2012 Society of Vertebrate Paleontology Conference in Raleigh, NC.

Miller, C. E., Granatosky, M. C., Chester, S. G. B., Boyer, D. M., Schmitt, D. 2012. Lumbar morphology of suspensory, gliding and flying mammals: implications for the locomotor behavior of select fossil primates. Journal of Vertebrate Paleontology, Program and Abstracts, 142. Presented at the 2012 Society of Vertebrate Paleontology Conference in Raleigh, NC.

Morse, P. E., Bloch, J. I., Secord, R., Chester, S. G. B., Boyer, D. M. 2012. Arctocyonid diversity during the Paleocene-Eocene thermal maximum of North America. Journal of Vertebrate Paleontology, Program and Abstracts, 146. Presented at the 2012 Society of Vertebrate Paleontology Conference in Raleigh, NC.

Secord, R., Bloch, J. I., Chester, S. G. B., Boyer, D. M., Krigbaum, J. 2012. Mammalian immigration and change in forest structure during the Paleocene-Eocene Thermal Maximum. Presented at the 2012 Geological Society of America Annual Meeting in Albuquerque, NM.

Granatosky, M. C., Lemelin, P., Hanna, J. B., Chester, S. G. B., Schmitt, D. 2012. American Journal of Physical Anthropology 147, S54: 154-155. Stable thoracolumbar morphology: Implications for terminal branch locomotion. Presented at the 2012 American Association of Physical Anthropologists Annual Meeting in Portland, OR.

Chester, S. G. B., Bloch, J. I. Systematics of Paleocene-Eocene micromomyid plesiadapiforms. 2012. American Journal of Physical Anthropology 147, S54: 114-115. Presented at the 2012 American Association of Physical Anthropologists Annual Meeting in Portland, OR.

Bercovici, A., Vajda, V., Lyson, T. R., Chester, S. G. B., Sargis, E. J., Pearson, D. A., Joyce, W. G. 2012. Terrestrial ecosystem collapse associated to the K-Pg boundary and dinosaur extinction: palynological evidences. European Geosciences Union, Vienna.

Chester, S. G. B., Bloch, J. I, Sargis, E.J., Silcox, M. T., Williamson, T.E. 2011. Arboreality in palaechthonid plesiadapiforms (Mammalia, Primates): New evidence from a partial skeleton of early Paleocene Torrejonia wilsoni. Journal of Vertebrate Paleontology 31 Supplement: 87A. Presented at the 2011 Society of Vertebrate Paleontology Conference in Las Vegas, NV.

Secord, R., Bloch, J. I., Chester, S. G. B., Boyer, D.M., Krigbaum, J. 2011. Forest structure, climate, and timing of mammalian immigrations during the Paleocene-Eocene Thermal Maximum in North America. Journal of Vertebrate Paleontology 31 Supplement: 192. Presentedat the 2011 Society of Vertebrate Paleontology Conference in Las Vegas, NV.

Lyson, T. R., Bercovici, A., Chester, S. G. B., Sargis, E. J., Joyce, W. G. 2011. Dinosaur Extinction: Closing the “Three Meter Gap”. Journal of Vertebrate Paleontology 31 Supplement: 148A. Presented at the 2011 Society of Vertebrate Paleontology Conference in Las Vegas, NV.

Bercovici, A., Lyson, T. R., Vajda, V., Chester, S. G. B., Sargis, E. J., Pearson, D. A., Joyce, W. G. 2011. Dinosaur extinction: no demise prior to the Chicxulub asteroid impact. 2nd Wiman Meeting on Scandinavian-Baltic Palaeontology, Uppsala, Sweden.

Chester, S. G. B., Beard, K. C. 2010. Late Paleocene micromomyid plesiadapiforms (Mammalia, Euarchonta) from Big Multi Quarry, Washakie Basin, Wyoming. Journal of Vertebrate Paleontology 30 Supplement: 71A. Presented at the 2010 Society of Vertebrate Paleontology Conference in Pittsburgh, PA.

Bloch, J. I., Randall, Z. S., Silcox, M. T., Chester, S. G. B., Boyer, D. M. 2010. Distal phalanges of Eocene North American notharctines (Mammalia, Primates): Implications for primate and anthropoid origins. Journal of Vertebrate Paleontology 30 Supplement: 60A. Presented at the 2010 Society of Vertebrate Paleontology Conference in Pittsburgh, PA.

Chester, S. G. B., Boyer, D. M., Bloch, J. I., Sargis, E. J., Jacobs, R. L., Patel, B. A. 2010. Hallucal metatarsal of euarchontan mammals. American Journal of Physical Anthropology 141, S50: 80. Presented at the 2010 American Association of Physical Anthropologists Annual Meeting in Albuquerque, NM.

Boyer D. M., Chester, S. G. B., Bloch, J. I. 2010. New fossil evidence on the structure of the plesiadapiform hand skeleton: implications for the evolution of grasping in primates. American Journal of Physical Anthropology 141, S50: 72. Presented at the 2010 American Association of Physical Anthropologists Annual Meeting in Albuquerque, NM.

Secord, R., Bloch, J. I., Boyer, D. M., Chester, S. G. B., Krigbaum, J. 2009. A new high-resolution continental record of the Paleocene-Eocene boundary carbon isotope excursion from mammalian tooth enamel. Geological Society of America Abstracts with Programs Vol. 41: 567. Presented at the 2009 Geological Society of America Annual Meeting in Portland, OR.

Chester, S. G. B., Secord, R., Bloch J. I. 2009. New Species of Palaeonictis(Mammalia, Creodonta) from the Paleocene-Eocene Thermal Maximum, Southern Bighorn Basin, Wyoming. Journal of Vertebrate Paleontology 29 Supplement: 77A. Presented at the 2009 Society of Vertebrate Paleontology Conference in Bristol, UK.

Bloch, J. I., Silcox, M. T., Chester, S. G. B., Gunnell, G. F. 2009. New observations on the cranial anatomy of Paleogene Micromomyidae (Mammalia, Primates) from the Clarks Fork Basin, Wyoming. Journal of Vertebrate Paleontology 29 Supplement: 66A. Presented at the 2009 Society of Vertebrate Paleontology Conference in Bristol, UK.

Bradley, B. J., Chester, S. G. B., Asher, R. J. 2009. Why the long face?: Runx2 tandem repeats and the evolution of primate prognathism. Journal of Vertebrate Paleontology 29 Supplement: 69A. Presented at the 2009 Society of Vertebrate Paleontology Conference in Bristol, UK.

Wing, S. L., Bloch, J. I., Bowen, G. J., Boyer, D. M., Chester, S. G. B., Diefendorf, A. F., Harrington, G. J., Kraus, M. J., Secord, R., Smith, F. A. 2009. “Coordinated sedimentary and biotic change during the Paleocene Eocene Thermal Maximum in the Bighorn Basin, Wyoming, USA,” in Climatic and Biotic Events of the Paleogene (CBEP 2009), extended abstracts from an international conference in Wellington, New Zealand, 12-15 January 2009. Edited by E. M. Crouch, C. P. Strong, and C. J. Hollis. GNS Science Miscellaneous Series 18, pp. 157- 163.

Chester, S. G. B., Sargis, E. J., Szalay, F. S., Archibald, J. D., Averianov, A. O. 2008. Therian femora from the Late Cretaceous of Uzbekistan. Journal of Vertebrate Paleontology 28 Supplement: 63A. Presented at the 2008 Society of Vertebrate Paleontology Conference in Cleveland, OH.

Secord, R., Chester, S. G. B., Bloch, J. I., Boyer, D. M., Krigbaum, J. 2008. The first North American equids: A high-resolution stratigraphic study in the Paleocene-Eocene thermal maximum. Journal of Vertebrate Paleontology 28 Supplement: 140A. Presented at the 2008 Society of Vertebrate Paleontology Conference in Cleveland, OH.

Chester, S. G. B., Sargis, E. J., Szalay, F. S., Archibald, J. D., Averianov, A. O. 2007. Functional analysis of mammalian humeri from the Late Cretaceous of Uzbekistan. Journal of Vertebrate Paleontology 27 Supplement: 58A. Presented at the 2007 Society of Vertebrate Paleontology Conference in Austin, TX.

Chester, S. G. B., Bloch, J. I., Boyer, D. M., Wing, S. L. 2005. Anachronistic occurrences of phenacodontid species in the Clarkforkian of the southern Bighorn Basin: Possible evidence against transient dwarfing in Ectocionand Copecion during the CIE-PETM interval. Journal of Vertebrate Paleontology 25 Supplement: 44A. Presented at the 2005 Society of Vertebrate Paleontology Conference in Mesa, AZ.