Acanthaulax aculeata
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"aculeata" (Klement, 1960, p.42, pl.5, figs.6-9; text-fig.21) Stover and Evitt, 1978, p.137. Holotype: Klement, 1960, pl.5, figs.6-7. NOW Tehamadinium. Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly Acanthaulax, fourthly Occisucysta, fifthly (and now) Tehamadinium. Age: Early Kimmeridgian.
Parent: Acanthaulax