Charlesdowniea aculeata

"aculeata" (Michoux, 1988, p.24,26, pl.1, figs.1,4,7–8; pl.2, figs.1–2; text-figs.5A–B,6A–B) Lentin and Vozzhennikova, 1990, p.74.  Holotype: Michoux, 1988, pl.1, figs.1,4,7; text-figs.5A–B.  NOW Michouxdinium.  Originally Kisselevia, subsequently Charlesdowniea, thirdly (and now) Michouxdinium.  Age: early Eocene.

Parent: Charlesdowniea