I am fascinated by the bidirectional interplay between plankton (palaeo)biology and the Earth’s climate.

My research interests span palaeobiology, biomineralization, taxonomy and geological applications of coccolithophores – a group of marine calcifying algae that have a pivotal role in the functioning of the carbon cycle over geological time.

In my current DPhil research, supervised by Professor Ros Rickaby and Dr. Jeremy Young, I aim to understand the recent evolutionary history of this phytoplankton group. My ambition is to determine the interaction between the morphological signals within deep oceanic sediments and of genetic variation in extant organisms by using a range of palaeontological and biogeochemical techniques. In a broader sense, I aim to shed light on the evolutionary processes driving speciation in the open oceans as well as the associated rates over macro-evolutionary timescales.

I am funded by NERC-DTP and an Oxford-Radcliffe Graduate Scholarship (University College).

Filatov, D.A., Bendif, E.M., Archontikis, O.A., Hagino, K. & Rickaby, R.E.M. 2021: The mode of speciation during a recent radiation in open-ocean phytoplankton. Current Biology. doi.org/10.1016/j.cub.2021.09.073.


Archontikis, O.A., Young, J.R. & Cros, L. 2020: Taxonomic revision and classification of extant holococcolithophores previously placed in the genus Anthosphaera Kamptner emend. Kleijne 1991. Acta Protozoologica. doi.org/10.4467/16890027AP.20.010.13265.


Gibbs, S.J., Bown, P.R., Ward, B.A., Alvarez, S.A., Kim, H., Archontikis O.A., Sauterey, B., Poulton, A. J. Wilson, J., Ridgwell, A. 2020: Algal plankton turn to hunting to survive and recover from end-Cretaceous impact darkness. Science Advances, doi.org/10.1126/sciadv.abc9123.