Hystrichosphaera heterostyla
From dinoflaj2
"heterostyla" Heisecke, 1970, p.238,240, pl.5, figs.1-4; pl.6, figs.4-5. Holotype: Heisecke, 1970, pl.5, figs.3-4; pl.6, fig.4. NOW Achomosphaera. Originally Hystrichosphaera, subsequently Spiniferites, thirdly (and now) Achomosphaera. Age: Danian.
Parent: Hystrichosphaera