Peridinium resistente Morgenroth, 1966

Now Phthanoperidinium. Originally Peridinium, subsequently (and now) Phthanoperidinium.
Possible tax. jr. synonym of Phthanoperidinium eocenicum (Cookson and Eisenack, 1965) Lentin and Williams, 1973, according to Stover and Evitt, 1978.
Holotype: Morgenroth, 1966, pl.2, figs.1-2
Age: Early Eocene