Phthanoperidinium illustrans

?illustrans (Wetzel, 1933a, p.167, pl.2, fig.15) Lentin and Williams, 1973, p.113.  Holotype: Wetzel, 1933a, pl.2, fig.15.  Originally Peridinium (Appendix B), subsequently (and now) Phthanoperidinium?.  Questionable assignment: Lentin and Williams (1973, p.113); Stover and Evitt (1978, p.119) as a problematic species.  Age: Senonian.

Parent: Phthanoperidinium