Phthanoperidinium obscurum
From dinoflaj3
obscurum Harland and Sharp, 1980, p.291,293–295, pl.1, figs.1–9, pl.2, figs.1–6; text-figs.3A–C. Holotype: Harland and Sharp, 1980, pl.1, figs.1–2. Age: late Eocene.
Parent: Phthanoperidinium