Hystrichosphaeropsis complanata
From dinoflaj3
complanata Eisenack, 1965b, p.153–154, pl.14, figs.5a–b,6–7; pl.15, figs.5a–b; text-figs.2a–b,3. Holotype: Eisenack, 1965b, pl.14, figs.5a–b; text-figs.2a–b; Jan du Chêne et al., 1986a, pl.46, figs.2–3 and pl.48, figs.1–3. Age: late Eocene–early Oligocene.
Parent: Hystrichosphaeropsis