Hystrichostrogylon membraniphorum subsp. granulatum
From dinoflaj3
subsp. granulatum Heilmann-Clausen in Heilmann-Clausen and Costa, 1989, p.468, pl.18, figs.1–3. Holotype: Heilmann-Clausen and Costa, 1989, pl.18, fig.3. Age: early Eocene.
Parent: Hystrichostrogylon membraniphorum