Leptodinium norrisii

"norrisii" Pocock, 1972, p.92–93, pl.24, figs.9–12; text-fig.9.  Holotype: Pocock, 1972, pl.24, fig.9; Jansonius, 1986, pl.2, figs.6–8; text-fig.5.  Originally Leptodinium, subsequently Dichadogonyaulax, thirdly Ctenidodinium, fourthly Korystocysta.  Taxonomic senior synonym: Gonyaulax (as Korystocysta) pachyderma, according to Benson (1985, p.154).  Taxonomic junior synonym: Dichadogonyaulax (subsequently Korystocysta) kettonensis, by implication in Conway (1990, p.35), who considered Dichadogonyaulax (as Korystocysta) kettonensis to be the senior name — however, Lentin and Williams (1993, p.374) retained Dichadogonyaulax (as Korystocysta) kettonensis.  Age: Callovian.

Parent: Leptodinium