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Jessica Theodor

Jessica Theodor is an associate professor of Ecology & Evolutionary Biology in the Department of Biological Sciences at UCalgary and is the recipient of a NSERC University Faculty Award.

With over 20 years of research experience, her current investigations in ecology, evolutionary biology, and paleobiology focus on understanding the causes of organismal diversity patterns found over geologic time.

Selected publications

  • Bravo-Cuevas, V. M., N. M. Morales-García, C. R. Barrón-Ortiz, J. M. Theodor, M. A. Cabral-Perdomo, 2017. Canid coprolites from the Late Pleistocene of Hidalgo, Central Mexico: Importance for the carnivore record of North America, Ichnos,  http://dx.doi.org/10.1080/10420940.2016.1270209.
  • Bravo-Cuevas, V. M., J. Priego-Vargas, E. Jiménez-Hidalgo, C. R. Barrón-Ortiz, J. M. Theodor, J. M. Castillo-Cerón, 2015. Feeding ecology of Astrohippus stockii form the Late Hemphillian of central Mexico: stable carbon isotopes analysis and dental wear patterns, Ameghiana 52(2):502-516
  • Rankin, B. , Fox, J., Barrón-Ortiz, C. R. ,  Chew, A., Holroyd, P., Ludtke, J. ,  Yang, X. , Theodor, J. 2015. The extended Price equation quantifies species selection on mammalian body size across the Palaeocene/Eocene Thermal Maximum, Proc. R. Soc. B 282 (1812), 20151097 doi: 10.1098/rspb.2015.1097
  • Janis, C. M., J. M. Theodor, 2014. Cranial and postcranial morphological data in ruminant phylogenetics. Zitteliana, B 32:15-31. http://epub.ub.uni-muenchen.de/22383/
  • Barrón-Ortiz, C. R. , J. M. Theodor, J. A. Cabrales, 2014. Dietary resource partitioning in the Late Pleistocene horses from Cedral, north-central Mexico: evidence from the study of dental wear. Revista Mexicana de Ciencias Geologícas 31(2), pp.260–269.
  • Snively, E., A. P. Russell, G. L. Powell, J. M. Theodor, M. J. Ryan, 2014. The role of the neck in the feeding behaviour of the Tyrannosauridae: inference based on kinematics and muscle function of extant avians. Journal Of Zoology, 292(4): 290–303. doi:10.1111/jzo.12109
  • Fraser, D.  , T. Zybutz†  , E. Lightner, J. M. Theodor, 2014. Ruminant mandibular tooth mesowear: a new scheme for increasing paleoecological sample sizes. Journal Of Zoology, 294(1): 41–48. doi:10.1111/jzo.12149
  • Saarinen, J. J., A. G. Boyer, J. H. Brown, D. P. Costa, S. K. M. Ernest, A. R. Evans, M. Fortelius, J. L. Gittleman, M. J. Hamilton, L. E. Harding, K. Lintulaakso, S. K. Lyons, J. G. Okie, R. M. Sibly, P. R. Stephens, J. M. Theodor, M. D. Uhen, F. A. Smith, 2014. Patterns of maximum body size evolution in Cenozoic land mammals: eco-evolutionary processes and abiotic forcing, Proc R Soc B 281(1784): 20132049–20132049. doi: 10.1098/rspb.2013.2049
  • Okie, J. G., A. G. Boyer, J. H. Brown, D. P. Costa, S. K. M. Ernest, A. R. Evans, M. Fortelius, J. L. Gittleman, M. J. Hamilton, L. E. Harding, K. Lintulaakso, S. K. Lyons, J. J. Saarinen, F. A. Smith, P. R. Stephens, J. Theodor, M. D. Uhen, R. M. Sibly, 2013. Effects of allometry, productivity and lifestyle on rates and limits of body size evolution. Proc R Soc B 280(1764): 20131007–20131007. doi:10.1098/rspb.2013.1007
  • Fraser, D. , J. M. Theodor, 2013. Ungulate diets reveal patterns of grassland evolution in North America. Palaeogeography Palaeoclimatology Palaeoecology, 369(C), pp.409–421.
  • Evans, A. R., D. Jones, A. G. Boyer, J. H. Brown, D. P. Costa, S. K. M. Ernest, E. M. G. Fitzgerald, M. Fortelius, J. L. Gittleman, M. J. Hamilton, L. E. Harding, K. Lintulaakso, S. K. Lyons, J. G. Okie, J. J. Saarinen, R. M. Sibly, F. A. Smith, P. R. Stephens, J. M. Theodor, M. D. Uhen, 2012. The maximum rate of mammal evolution, PNAS doi:10.1073/pnas.1120774109
  • Parham, J., P. Donoghue, C. Bell,T. Calway, J. Head, P.Holroyd, J. Inoue, R. Irmis, W.Joyce, D. Ksepka, J.Patane, N. Smith, J. Tarver, M. van Tuinen, Z. Yang, K. Angielczyk, J. Greenwood, C. Hipsley, L. Jacobs, P. Makovicky, J. Müller, K. Smith, J. Theodor, R. Warnock, M. Benton, 2012. Systematic Biology, 61(2), pp.346–359, doi:10.1093/sysbio/syr107
  • Fraser, D.J. M. Theodor, 2011. Anterior dentary shape as an indicator of diet in ruminant artiodactyls, Journal of Vertebrate Paleontology, 31:6, 1366-1375, doi:10.1080/02724634.2011.605404 
  • Fraser, D. , J.M. Theodor, 2011. Comparing ungulate dietary proxies using discriminant function analysis. Journal of Morphology, 272:1513–1526, doi:/10.1002/jmor.11001/full
  • Snively, E., J. M. Theodor. 2011. Common functional correlates of head-strike behavior in the pachycephalosaur Stegoceras validum (Ornithischia, Dinosauria) and combative artiodactyls, PLoSOne,  http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0021422,  doi:10.1371/journal.pone.0021422.
  • Smith, F.A., A.G. Boyer, J.H. Brown, D. Costa, T. Dayan, S.K.M. Ernest, A.R. Evans, M. Fortelius, J.L. Gittleman, M. J. Hamilton, L.E. Harding, K. Lintulaakso, S.K. Lyons, C. McCain, J.G. Okie, J.J. Saarinen, R.M. Sibly, P.R. Stephens, J. Theodor, M.D. Uhen, 2010. The Evolution of Maximum Body Size of Terrestrial Mammals. Science, 330:1216-1219, doi:10.1126/science.1194830
  • Fraser, D. , J. M. Theodor, 2010. The use of gross dental wear in dietary studies of extinct lagomorphs. Journal of Paleontology (4):720-729. doi: 10.1666/09-066.1
  • Theodor, J. M. 2010. Micro-computed tomography scanning of the ear region of Cainotherium: Character analysis and implications. Journal of Vertebrate Paleontology, 29(4):236-243, doi:10.1080/02724630903415979
  • Geisler, J. H., J. M. Theodor. 2009. Hippopotamus and whale phylogeny. Nature, April 19 2009. doi:10.1038/nature07776.
  • Theodor, J. M., J. Erfurt, G. Métais, 2007. The earliest artiodactyls: Diacodexeidae, Dichobunidae, Homacodontidae, Leptochoeridae and Raoellidae, p. 32-58, In The Evolution of Artiodactyls, D. R. Prothero, S. E. Foss, eds. Johns Hopkins University Press.
  • Geisler, J. H., J. M. Theodor, M. D. Uhen, S. E. Foss, 2007, Phylogenetic relationship of cetaceans to terrestrial artiodactyls, p. 19-31, In The Evolution of Artiodactyls, D. R. Prothero, S. E. Foss, eds. Johns Hopkins University Press.
  • Theodor, J. M., K. D. Rose, J. Erfurt, 2005. Origin and relationships of Artiodactyla, p. 215-233 In The Rise of Placental Mammals, K. D. Rose and J. D. Archibald, eds. Johns Hopkins University Press.
  • Janis, C. M., J. Damuth, J. M. Theodor, 2004. The species richness of Miocene browsers, and implications for habitat type and primary productivity in the North American grassland biome. Palaeogeography, Palaeoclimatology, Palaeoecology, 207(3-4):371-398.
  • Janis, C. M., J. M. Theodor, B. Boisvert, 2002. Locomotor evolution in camels revisited: a quantitative analysis of pedal anatomy and the acquisition of the pacing gait. Journal of Vertebrate Paleontology 22(1):110-121.
  • Janis, C. M., J. Damuth, J. M. Theodor, 2002. The origins and evolution of the North American grassland biome: the story from the hoofed mammals. Palaeogeography, Palaeoclimatology, Palaeoecology 177(1-2):183-189.
  • Janis, C. M. , J. Damuth, J. M. Theodor, 2000. Mammalian ungulates and terrestrial primary productivity: where have all the browsers gone? Proceedings of the National Academy of Sciences, 97(14):7899-7904.

 

Jessica Theodor on ResearchGate

Jessica Theodor on Google Scholar

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