Hystrichogonyaulax saepita (Ashraf, 1979) Lentin and Williams, 1981

Now Leptodinium. Originally (and now) Leptodinium, subsequently Hystrichogonyaulax, thirdly Rhynchodiniopsis, fourthly Ctenidodinium.
Holotype: Ashraf, 1979, pl.3, fig.2
Age: Late Jurassic (Malm)