Phthanoperidinium pseudoechinatum

"?pseudoechinatum" Bujak in Bujak et al., 1980, p.75–76, pl.19, fig.20; text-fig.20C.  Holotype: Bujak et al., 1980, pl.19, fig.20.  Questionable assignment: Bujak in Bujak et al. (1980, p.75).  Taxonomic senior synonym: Peridinium (now Phthanoperidinium) stockmansii, by implication in Islam (1982, p.309), who considered Phthanoperidinium? pseudoechinatum to be a taxonomic junior synonym of Phthanoperidinium echinatum, which is now a taxonomic junior synonym of Peridinium (now Phthanoperidinium) stockmansii.  Age: middle Eocene (see Aubry, 1986).

Parent: Phthanoperidinium