Back
Acanthaulax aceras
From Fensome et al., 2019:
Acanthaulax? aceras (Eisenack, 1958a, p.391, pl.21, figs.1–2) Stover and Evitt, 1978, p.137.
Emendation: Sarjeant, 1985a, p.57,59, as Cribroperidinium aceras.
Holotype: Eisenack, 1958a, pl.21, fig.1; Sarjeant, 1985a, pl.4, figs.1–2; Jan du Chêne et al., 1986a, pl.2, figs.6–7.
NOW Cribroperidinium.
Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta? (combination not validly published), thirdly Leptodinium, fourthly Acanthaulax?, fifthly (and now) Cribroperidinium.
Questionable assignment: Stover and Evitt (1978, p.137).
Age: Aptian.
Locus typicus: borehole at Marne, Feld Heide, N Germany
---------------------------------------------------------------------------------------------------
Original description as Gonyaulax aceras: [Eisenack, 1958, p. 391]: (Translation Eisenack, 1958: Sarjeant, 1985):
Diagnosis:
Shell oval, without horns. Epi- and hypotheca almost equal. Transverse furrow spiral, narrow, delimited by solid but low crests. Plate boundaries only partially marked by crests, these and the plate surfaces being set with short, pointed tubercles, so that the tabulation is scarcely discernible.
Acanthaulax? aceras (Eisenack, 1958a, p.391, pl.21, figs.1–2) Stover and Evitt, 1978, p.137.
Emendation: Sarjeant, 1985a, p.57,59, as Cribroperidinium aceras.
Holotype: Eisenack, 1958a, pl.21, fig.1; Sarjeant, 1985a, pl.4, figs.1–2; Jan du Chêne et al., 1986a, pl.2, figs.6–7.
NOW Cribroperidinium.
Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta? (combination not validly published), thirdly Leptodinium, fourthly Acanthaulax?, fifthly (and now) Cribroperidinium.
Questionable assignment: Stover and Evitt (1978, p.137).
Age: Aptian.
Locus typicus: borehole at Marne, Feld Heide, N Germany
---------------------------------------------------------------------------------------------------
Original description as Gonyaulax aceras: [Eisenack, 1958, p. 391]: (Translation Eisenack, 1958: Sarjeant, 1985):
Diagnosis:
Shell oval, without horns. Epi- and hypotheca almost equal. Transverse furrow spiral, narrow, delimited by solid but low crests. Plate boundaries only partially marked by crests, these and the plate surfaces being set with short, pointed tubercles, so that the tabulation is scarcely discernible.