Charlesdowniea rhomboidalis
From dinoflaj2
rhomboidalis (He Chengquan, 1991, p.93, pl.35, figs.11-13) Lentin and Williams, 1993, p.94. Holotype: He Chengquan, 1991, pl.35, figs.11-12. Originally Kisselevia, subsequently (and now) Charlesdowniea. Age: Mid Eocene.
Parent: Charlesdowniea