Warny and Wrenn, 1997
From dinoflaj3
Warny, S.A. and Wrenn, J.H., 1997: New species of dinoflagellate cysts from the Bou Regreg core: a Miocene-Pliocene boundary section on the Atlantic coast of Morocco. Review of Palaeobotany and Palynology, v.96, p.281-304, pl.1-10.