Lithodinia acanthosphaera

"?acanthosphaera" (Sarjeant, 1961a, p.94-95, pl.13, fig.14; text-fig.4) Lentin and Williams, 1977b, p.100.  Emendation: Sarjeant, 1976c, p.12, as Meiourogonyaulax? acanthosphaera.  Holotype: Sarjeant, 1961a, pl.13, fig.14; text-fig.4; Sarjeant, 1976c, pl.5, figs.2,4.  NOW Meiourogonyaulax? Originally Gonyaulax (Appendix B), subsequently Acanthogonyaulax (combination not validly published), thirdly Acanthaulax, fourthly Meiourogonyaulax, fifthly (and now) Meiourogonyaulax?, sixthly Lithodinia, seventhly Lithodinia?.  Questionable assignment: Williams et al. (1993, p.56) as a problematic species.  Age: Early Oxfordian.

Parent: Lithodinia