Leptodinium porosum

porosum (Lejeune-Carpentier, 1946, p.B193,B196; text-fig.6) Sarjeant, 1969, p.13.  Emendation: Lejeune-Carpentier and Sarjeant, 1981, p.7–8, as Leptodinium porosum.  Holotype: Lejeune-Carpentier, 1946, text-fig.6; Streel et al., 1977, pl.2, fig.4; Lejeune-Carpentier and Sarjeant, 1981, pl.3, figs.1–2; text-fig.4.  Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta (combination not validly published), thirdly (and now) Leptodinium, fourthly Leptodinium?.  Questionable assignment: Stover and Evitt (1978, p.171) as a problematic species — however, Lejeune-Carpentier and Sarjeant (1981, p.7) included the species in Leptodinium without question.  Jan du Chêne et al. (1986a, p.211) recommended that this name be restricted to the holotype.  Age: Late Cretaceous.

Parent: Leptodinium