Microdinium robustum
From dinoflaj3
"robustum" Davey, 1969b, p.6, pl.1, fig.3; pl.2, fig.2. Holotype: Davey, 1969b, pl.1, fig.3; pl.2, fig.2. Taxonomic senior synonym: Microdinium (as Cladopyxidium) saeptum, according to Stover and Evitt (1978, p.30). Age: Maastrichtian–?Danian.
Parent: Microdinium