Gospocic, J., E. J. Shields, K. M. Glastad, Y. Lin, C. A. Penick, H. Yan, A. S. Mikheyev, T. A. Linksvayer, B. A. Garcia, S. L. Berger, J. Liebig, D. Reinberg and R. Bonasio. 2017. The neuropeptide corazonin controls social behavior and caste identify in ants. Cell 170(4):748-759.e12. DOI: 10.1016/j.cell.2017.07.014. (link )

Penick, C. A. and J. Liebig. 2017. A larval ‘princess pheromone’ identifies future ant queens based on their juvenile hormone content. Animal Behaviour 128(Jun):33-40. DOI: 10.1016/j.anbehav.2017.03.029. (link )

Yan, H., C. Opachaloemphan, G. Mancini, H. Yang, M. Gallitto, J. Mlejnek, A. Leibholz, K. Haight, M. Ghaninia, L. Huo, M. Perry, J. Slone, X. Zhou, M. Traficante, C. A. Penick, K. Dolezal, K. Gokhale, K. Stevens, I. Fetter-Pruneda, R. Bonasio, L. J. Zwiebel, S. L. Berger, J. Liebig, D. Reinberg and C. Desplan. 2017. An engineered orco mutation produces aberrant social behavior and defective neural development in ants. Cell 170(4):736-747e9. DOI: 10.1016/j.cell.2017.06.051. (link )

Brent, C. S., C. A. Penick, B. Trobaugh, D. Moore and J. Liebig. 2016. Induction of a reproductive-specific cuticular hydrocarbon profile by a juvenile hormone analog in the termite Zootermopsis nevadensis. Chemoecology 26(5):195-203. DOI: 10.1007/s00049-016-0219-8. (link )

Penick, C. A., C. S. Brent, K. Dolezal and J. Liebig. 2014. Neurohormonal changes associated with ritualized combat and the formation of a reproductive hierarchy in the ant Harpegnathos saltator. Journal of Experimental Biology 217(9):1496-1503. DOI: 10.1242/jeb.098301. (link )

Penick, C. A., B. Trobaugh, C. S. Brent and J. Liebig. 2013. Head-butting as an early indicator of reproductive disinhibition in the termite Zootermopsis nevadensis. Journal of Insect Behavior 26(1):23-34. DOI: 10.1007/s10905-012-9332-x. (link )

Penick, C. A. and J. Liebig. 2012. Regulation of queen development through worker aggression in a predatory ant. Behavioral Ecology 23(5):992-998. DOI: 10.1093/beheco/ars062. (link )

Penick, C. A., S. S. Prager and J. Liebig. 2012. Juvenile hormone induces queen development in late-stage larvae of the ant Harpegnathos saltator. Journal of Insect Physiology 58(12):1643-1649. DOI: 10.1016/j.jinsphys.2012.10.004. (link )

Smith, A. A., R. P. Overson, B. Holldobler, J. Gadau and J. Liebig. 2012. The potential for worker reproduction in the ant Aphaenogaster cockerelli and its absence in the field. Insectes Sociaux 59(3):411-416. DOI: 10.1007/s00040-012-0235-9. (link )

Penick, C. A., J. Liebig and C. S. Brent. 2011. Reproduction, dominance, and caste: Endocrine profiles of queens and workers of the ant Harpegnathos saltator. Journal of Comparative Physiology A 197:1063-1071. DOI: 10.1007/s00359-011-0667-0. (link )