Phthanoperidinium polytrix

polytrix (Benedek, 1972, p.20, pl.6, figs.1a-b) Lentin and Williams, 1976, p.76.  Emendation: Benedek and Sarjeant, 1981, p.330-333, as Phthanoperidinium polytrix.  Holotype: Benedek, 1972, pl.6, figs.1a-b; Benedek and Sarjeant, 1981, fig.2, nos.4,6, fig.6.  Originally Hystrichogonyaulax, subsequently Phthanoperidinium?, thirdly (and now) Phthanoperidinium.  Questionable assignment: Lentin and Williams (1976, p.76) - however, Benedek and Sarjeant (1981, p.330) included the species in Phthanoperidinium without question.  Age: mid Oligocene.

Parent: Phthanoperidinium