Kisselevia 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. 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.