Phthanoperidinium crenulatum
From dinoflaj3
crenulatum (de Coninck, 1975, p.96, pl.17, figs.5–7,12–15) Lentin and Williams, 1977b, p.131. Emendation: Heilmann-Clausen, 1985, p.24–25, as Phthanoperidinium crenulatum. Holotype: de Coninck, 1975, pl.17, figs.12–13. Originally Peridinium, subsequently (and now) Phthanoperidinium. Age: early Eocene (Ypresian).
