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Ryan W. Norris, Assistant Professor
Ph.D. (Biology) University of Vermont
M.S. (Biology) University of Vermont
B.S. (Biology) University of Idaho

Contact Information:

Office: Science Building 334
Phone: 419-995-8360
Email: norris.667@osu.edu
Mailing address:
4240 Campus Dr.
Lima, OH 45804

Dr. Norris joins the OSU Lima faculty in Autumn 2014.  He has taught courses in introductory biology, physiology, and organismal biology at Lock Haven University of Pennsylvania and Penn State York.  He completed two postdocs, one at the National Institute of Standards and Technology and another at Penn State.

Research Interests

Dr. Norris is a mammalogist and a systematist.  His research focuses on determining the evolutionary relationships of rodents and other small mammals and involves questions ranging from deep history to recent patterns in populations.  He has worked on projects involving integrating genetic data with fossil information, using genetics to uncover how past climate influenced evolution, and developing and applying molecular evolution techniques. In addition to work in North America, his fieldwork with small mammals has taken him to West Africa and he has worked on species from Central Asia.


Fulton, T. L.,  R.W. Norris,  R.W. Graham, H.A. Semken Jr., and  B. Shapiro. 2013. Ancient DNA supports southern survival of Richardson’s collared lemming (Dicrostonyx richardsoni) during the Last Glacial Maximum.  Molecular Ecology, 22:2540-2548.  DOI: 10.1111/mec.12267

Decher, J., R.W. Norris, and J. Fahr. 2010. Small mammal survey in the upper Seli River valley, Sierra Leone.  Mammalia, 74:163-176.  DOI: 10.1515/mamm.2010.026

Norris, R.W., C.A. Woods, and C.W. Kilpatrick. 2008. Morphological and molecular definition of Calomyscus hotsoni (Rodentia: Muroidea: Calomyscidae). Journal of Mammalogy, 89:306-315.  DOI: 10.1644/06-mamm-A-071R1.1

McPartland, J.M., R.W. Norris, and C.W. Kilpatrick. 2007. Coevolution between cannabinoid receptors and endocannabinoid ligands. Gene (Amsterdam), 397:126-135.  DOI: 10.1016/j.gene.2007.04.017

Norris, R.W., K. Zhou, C. Zhou, G. Yang, C.W. Kilpatrick, and R.L. Honeycutt. 2004. The phylogenetic position of the zokors (Myospalacinae) and comments on the families of muroids (Rodentia).  Molecular Phylogenetics and Evolution, 31:972-978.  DOI: 10.1016/j.ympev.2003.10.020