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Gonyaulax aceras
Gonyaualax aceras Eisenack, 1958; Emendation: Sarjeant, 1985a, p.57,59, as Cribroperidinium aceras.
NOW Cribroperidinium. Originally Gonyaulax, subsequently Gonyaulacysta? (combination not validly published), thirdly Leptodinium, fourthly Acanthaulax?, fifthly (and now) Cribroperidinium.
Holotype: Eisenack, 1958, pl.21, fig.1; Sarjeant, 1985, pl.4, figs.1-2; Jan du Chene et al., 1986, pl.2, figs.6-7
Paratype: Eisenack, 1958
Locus typicus: borehole at Marne, Feld Heide, N Germany
Stratum typicum: Aptian
Translation Eisenack, 1958: Sarjeant, 1985
Original diagnosis: Eisenack, 1958, p.391
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.
NOW Cribroperidinium. Originally Gonyaulax, subsequently Gonyaulacysta? (combination not validly published), thirdly Leptodinium, fourthly Acanthaulax?, fifthly (and now) Cribroperidinium.
Holotype: Eisenack, 1958, pl.21, fig.1; Sarjeant, 1985, pl.4, figs.1-2; Jan du Chene et al., 1986, pl.2, figs.6-7
Paratype: Eisenack, 1958
Locus typicus: borehole at Marne, Feld Heide, N Germany
Stratum typicum: Aptian
Translation Eisenack, 1958: Sarjeant, 1985
Original diagnosis: Eisenack, 1958, p.391
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.