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Cribroperidinium muderongense
From Fensome et al., 2019:
Cribroperidinium ?muderongense (Cookson and Eisenack, 1958, p.32, pl.3, figs.3–4; text-fig.15) Davey, 1969a, p.128. Holotype: Cookson and Eisenack, 1958, pl.3, fig.3; text-fig.15. Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta (combination not validly published), thirdly (and now) Cribroperidinium, fourthly
Cribroperidinium?. Taxonomic junior synonym: Gonyaulax (as Cribroperidinium) diaphana, according to
Backhouse (1988, p.80). Questionable assignment: Helenes (1984, p.125) as a problematic species — however,
Santos et al. (2018, p.162) considered the attribution to Cribroperidinium to be without question. Age: Aptian.
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Original description: Cookson and Eisenack, p. 32
Theca biconical to oval a with rather long, stiff horn that is closed by a "lid" having a short terminal projection; hypotheca and epitheca nearly equal. Girdle narrow, helicoid; longitudinal furrow short, extending somewhat into the epitheca and not reaching the antapex. Plates numerous, slightly granular provided with irregulary distributed short, blunt spiny outgrouths and worm-like surface ridges, sutures thickened. The girdle is bordered on both sides by short regulary arranged processes which are terminations of the ridges on the surface of the plates adjoining it. Wall of theca moderately thick sometimes with an outer thin transparent ornament formed by the coalescence of fine processes.
Dimensions: Range 109-147x94-105 µm. Apical horn 16-25 µm long.
Cribroperidinium ?muderongense (Cookson and Eisenack, 1958, p.32, pl.3, figs.3–4; text-fig.15) Davey, 1969a, p.128. Holotype: Cookson and Eisenack, 1958, pl.3, fig.3; text-fig.15. Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta (combination not validly published), thirdly (and now) Cribroperidinium, fourthly
Cribroperidinium?. Taxonomic junior synonym: Gonyaulax (as Cribroperidinium) diaphana, according to
Backhouse (1988, p.80). Questionable assignment: Helenes (1984, p.125) as a problematic species — however,
Santos et al. (2018, p.162) considered the attribution to Cribroperidinium to be without question. Age: Aptian.
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Original description: Cookson and Eisenack, p. 32
Theca biconical to oval a with rather long, stiff horn that is closed by a "lid" having a short terminal projection; hypotheca and epitheca nearly equal. Girdle narrow, helicoid; longitudinal furrow short, extending somewhat into the epitheca and not reaching the antapex. Plates numerous, slightly granular provided with irregulary distributed short, blunt spiny outgrouths and worm-like surface ridges, sutures thickened. The girdle is bordered on both sides by short regulary arranged processes which are terminations of the ridges on the surface of the plates adjoining it. Wall of theca moderately thick sometimes with an outer thin transparent ornament formed by the coalescence of fine processes.
Dimensions: Range 109-147x94-105 µm. Apical horn 16-25 µm long.