Hystrichogonyaulax regalis (Gocht, 1970) Stover and Evitt, 1978

Now Rhynchodiniopsis?. Originally Leptodinium, subsequently Hystrichogonyaulax, thirdly (and now) Rhynchodiniopsis?.
Holotype: Gocht, 1970, pl.33, fig.6, text-fig.10; Jan du Chêne et al., 1986, pl.98, figs.6-10
Age: Early Bathonian