Palaeoperidinium marginatum
From dinoflaj2
"marginatum" (Vozzhennikova, 1967, p.107, pl.46, figs.1,3-4,6) Lentin and Williams, 1976, p.110. Holotype: Vozzhennikova, 1967, pl.46, fig.6; Lentin and Vozzhennikova, 1990, pl.7, fig.6; text-fig.33; lost according to Lentin and Vozzhennikova (1990, p.62). Originally Pentagonum (generic name illegitimate), subsequently Palaeoperidinium. Taxonomic senior synonym: Peridinium (now Palaeoperidinium) pyrophorum, according to Lentin and Vozzhennikova (1990, p.61). Age: Paleocene.
Parent: Palaeoperidinium