Peridinium stockmansii de Coninck, 1975

Originally Peridinium, subsequently Phthanoperidinium.
Possible tax. jr. synonym of Phthanoperidinium eocenicum (Cookson and
Eisenack, 1965) Lentin and Williams, 1973, according to Stover and Evitt, 1978.
Tax. jr. synonym of Phthanoperidinium echinatum Eaton, 1976, according to de Coninck, 1977.
Holotype: de Coninck, 1975, pl.17, figs.26-27
Age: Early Eocene (Ypresian)