Rhombodinium rugosum

"rugosum" Michoux, 1988, p.30–31, pl.3, figs.1–9; text-figs.8A–B.  Holotype: Michoux, 1988, pl.3, figs.1–5; text-figs.8A–B.  NOW Petalodinium.  Originally Rhombodinium, subsequently (and now) Petalodinium.  Age: early Eocene.

Parent: Rhombodinium