Sandra M. Rehan, Ph.D.

Sandra M. Rehan, Ph.D.

Assistant Professor

Educational Background:

Post-Doctoral Research Fellow, University of Pennsylvania, 2013
Research Fellow, Smithsonian Tropical Research Institute, 2011
CeratinaPh.D. in Ecology and Evolution, Brock University, 2011
Scholar, Flinders University of South Australia, 2010
B.Sc. in Biological Sciences, Brock University, 2008

Courses Taught:

Genes and behavior

General Area of Interest and/or Specialty:

Animal Behavior, Comparative Genomics, Evolution, Molecular Phylogenetics, Sociobiology

Description of Current Research and/or Professional Activities:

The lab research focuses on social evolution and genetics. We study bees to understand the genetic underpinnings and ecological constraints selecting for social behavior. This research includes:

  • Field and lab experiments in New England and Australia to understand the behavior and ecology of native bees.
  • Genomics to understand relatedness and gene expression of individuals in social groups.
  • Molecular phylogeny to understand bee biodiversity, historical biogeography, as well as the age and origin of sociality.

Selected Publications:

  • Rehan S, Leys R, Schwarz M (2013) First evidence for a massive extinction event affecting bees close to the K-T boundary. PLOS ONE. In press
  • Rehan S, Richards M (2013) Reproductive aggression and nestmate recognition in a subsocial bee. Animal Behavior. 85:733-741
  • Rehan S, Rotella A, Onuferko T, Richards M (2013) Colony disturbance and solitary nest initiation by workers in the obligately eusocial sweat bee, Halictus ligatus. Insectes Sociaux. 60:389-392
  • Rehan, S., Leys, R., Schwarz, M. (2012) A mid-cretaceous origin of sociality in xylocopine bees with only two origins of true worker castes. PLOS ONE. 7(4): e34690
  • Rehan, S., Schwarz, M., Richards, M. (2011) Fitness consequences of ecological constraints and implications for the evolution of sociality in an incipiently social bee. Biological Journal of the Linnean Society. 103:57-67
  • Schwarz, M., Tierney, S., Rehan, S., Chenoweth, L., Cooper, S. (2011) The evolution of eusociality in allodapine bees: workers began by waiting. Biology Letters. 7:277-280
  • Rehan, S., Chapman, T., Craigie, A., Richards, M., Cooper, S. and Schwarz, M. (2010) Molecular phylogeny of the small carpenter bees (Hymenoptera: Apidae: Ceratinini) indicates early and rapid global dispersal. Molecular Phylogenetics and Evolution. 55:1042-1054
  • Rehan, S., Richards, M. (2010) Nesting and life cycle of Ceratina calcarata in southern Ontario (Hymenoptera: Apidae: Xylocopinae). Canadian Entomologist. 142:65-74
  • Rehan, S., Richards, M. (2010) The influence of maternal quality on brood sex allocation in the small carpenter bee, Ceratina calcarata. Ethology. 116:876-887
  • Rehan, S., Richards, M., Schwarz, M. (2010) Sociality in the Australian small carpenter bee Ceratina (Neoceratina) australensis. Insectes Sociaux. 57:403-412
  • Rehan, S., Richards, M., Schwarz, M. (2009) Evidence of social nesting in Ceratina of Borneo. Journal of the Kansas Entomological Society. 82:194-209

For a full list of publications please visit the lab website at

Sandra Rehan
Rudman Hall Rm 191
Durham, NH 03824