Hemicystodinium congregatum
From dinoflaj3
"congregatum" Stover, 1977, p.79, pl.3, figs.39–44. Holotype: Stover, 1977, pl.3, figs.39–42. NOW Polysphaeridium. Originally Hemicystodinium, subsequently (and now) Polysphaeridium. Age: middle Oligocene.
Parent: Hemicystodinium