Palaeoperidinium damasii (Lejeune-Carpentier, 1942, p.B185–B186, figs.9–14) Lentin and Williams, 1976, p.110. Emendation: Lejeune-Carpentier and Sarjeant, 1981, p.16, as Deflandrea? damasii.

Now Deflandrea?. Originally Peridinium, subsequently Cooksoniella?, thirdly Palaeoperidinium, fourthly Deflandrea, fifthly (and now) Deflandrea?.
Holotype: Lejeune-Carpentier, 1942, fig.10; Lejeune-Carpentier and Sarjeant, 1981, pl.6, fig.3; text-fig.9a
Age: Senonian