Pterodinium circumsutum
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"circumsutum" Morgenroth, 1966b, p.5, pl.1, figs.3–4. Holotype: Morgenroth, 1966b, pl.1, fig.3. NOW Pentadinium?. Originally Pterodinium, subsequently (and now) Pentadinium?. Age: early Oligocene.
Parent: Pterodinium