Acanthaulax acanthosphaera

"acanthosphaera" (Sarjeant, 1961a, p.94–95, pl.13, fig.14; text-fig.4) Sarjeant, 1968, p.227.  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?.  Age: early Oxfordian.

Parent: Acanthaulax