Peridinium comatum Morgenroth, 1966

Now Phthanoperidinium. Originally Peridinium, subsequently (and now) Phthanoperidinium.
Tax. sr. synonym of Phthanoperidinium tritonium Eaton, 1976, according to Bujak in Bujak et al., 1980.
Tax. sr. synonym of Phthanoperidinium coreoides (Benedek, 1972) Lentin and Williams, 1976, according to Stover and Evitt, 1978; however, Benedek and Sarjeant, 1981 retained Phthanoperidinium coreoides as a separate species.
Holotype: Morgenroth, 1966, pl.1, fig.1
Age: Early Oligocene