Rochon et al., 2003
From dinoflaj3
Rochon, A., Mudie, P.J., Aksu, A.E. and Gillespie, H., 2003: Pterocysta gen. nov.: a new dinoflagellate cyst from Pleistocene glacial-stage sediments of the Black and Marmara seas. Palynology, v.26, p.95-105, pl.1-3. (Cover date 2002, issue date 2003.)