Korystocysta pachyderma

pachyderma (Deflandre, 1939a, p.176–178, pl.7, figs.6–10; text-figs.7–10) Woollam, 1983, p.194.  Holotype: Deflandre, 1939a, pl.7, figs.6–7.  Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly Ctenidodinium, fourthly Ctenidodinium?, fifthly (and now) Korystocysta, sixthly Dichadogonyaulax.  Lentin and Williams (1989, p.213) retained this species in Korystocysta.  Taxonomic junior synonyms: Dichadogonyaulax (subsequently Korystocysta) kettonensis by implication in Conway (1990, p.35), who considered Dichadogonyaulax pachyderma to be the senior name — however, Lentin and Williams (1993, p.374) retained Dichadogonyaulax (as Korystocysta) kettonensis; Leptodinium (as Korystocysta) norrisii, according to Benson (1985, p.154).  Age: Oxfordian.

Parent: Korystocysta