Ellipsoidictyum circulatum
From dinoflaj2
"circulatum" (Clarke and Verdier, 1967, p.67-68, pl.1, fig.11; pl.2, fig.3; text-fig.28) Lentin and Williams, 1977b, p.56. Holotype: Clarke and Verdier, 1967, pl.1, fig.11. NOW Elytrocysta. Originally Dictyopyxidia, subsequently Ellipsoidictyum, thirdly (and now) Elytrocysta. Age: Cenomanian-Santonian.
Parent: Ellipsoidictyum
