Acanthaulax acanthosphaera
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"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