Erik Ragsdale

Erik Ragsdale

Associate Professor, Biology



  • Postdoctoral Fellow, Max Planck Institute for Developmental Biology, 2010-2014
  • Ph.D., University of California, Riverside, 2009


Casasa, S., Katsougia, E., and Ragsdale, E.J. (2023). A Mediator subunit imparts robustness to a polyphenism decision. PNAS 120:e2308816120.

Harry, C.J., Messar, S.M., and Ragsdale, E.J. (2022). Comparative reconstruction of the predatory feeding structures of the polyphenic nematode Pristionchus pacificus. Evolution & Development 24:16–36.

Casasa, S., Biddle, J.F., Koutsovoulos, G.D., and Ragsdale, E.J. (2021). Polyphenism of a novel trait integrated rapidly evolving genes into ancestrally plastic networks. Molecular Biology and Evolution 38:331–343.

Biddle, J.F., and Ragsdale, E.J. (2020). Regulators of an ancient polyphenism evolved through episodic protein divergence and parallel gene radiations. Proceedings of the Royal Society of London B 287:20192595.

Bui, L.T., and Ragsdale, E.J. (2019). Multiple plasticity regulators reveal targets specifying an induced predatory form in nematodes. Molecular Biology and Evolution 36:2387–2399.

Ledón-Rettig, C.C., Moczek, A.P., and Ragsdale, E.J. (2018). Diplogastrellus nematodes are sexually transmitted mutualists that alter the bacterial and fungal communities of their beetle host. PNAS 115: 10696–10701.

Bui, L.T., Ivers, N.A., and Ragsdale, E.J. (2018). A sulfotransferase dosage-dependently regulates mouthpart polyphenism in the nematode Pristionchus pacificus. Nature Communications 9: 4119.

Kieninger, M. R., Ivers, N. A., Rödelsperger, C., Markov, G. V., Sommer, R. J., and Ragsdale, E. J. (2016). The nuclear hormone receptor NHR-40 acts downstream of the sulfatase EUD-1 as part of a developmental plasticity switch in Pristionchus. Current Biology 26: 1-6.

See all publications