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Cribroperidinium edwardsii
From Fensome et al., 2019:
Cribroperidinium ?edwardsii (Cookson and Eisenack, 1958, p.32, pl.3, figs.5–6; text-fig.7) Davey, 1969a, p.128. Holotype: Cookson and Eisenack, 1958, pl.3, fig.6; text-fig.7; Jan du Chêne et al., 1986a, pl.32, fig.4; pl.33, fig.3. Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly Cribroperidinium, fourthly (and now) Cribroperidinium?. Questionable assignment: Helenes (1984, p.125) as a problematic species. Taxonomic junior synonyms: Gonyaulax (now Cribroperidinium) apione, according to Burger (1980a, p.82) — however, Jan du Chêne et al. (1986a, p.76) retained Cribroperidinium apione; Gonyaulax (as Cribroperidinium) orthoceras, according to Davey and Verdier (1971, p.17) — however, Below (1981a, p.39–40) and Lentin and Williams (1985, p.79) retained Cribroperidinium orthoceras. Age: Albian–early Turonian.
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Original description: Cookson and Eisenack, 1958, p.32-33: Gonyaulax edwardsii
Shell nearly sphaerical, thick walled. Epitheca with a long, stiff, pointed and sometimes curved horn. Girdle helicoid, narrow with low borders; longitudinal furrow broad. Plates finely granular, the inner surface of girdle sometimes more coarsely granular than plates. Sutures of the plates with low, thin ledges which often bear a few rather broad, pointed spines especially in the apical and antapical regions.
Dimensions: Type 143x125 µm overall.
Supplemental description: Vozzhennikova, 1967, p.122
Theca almost sphaerical, thickwalled. Epitheca with a long bluntly ended apical horn. Hypotheca broadly rounded at the posterior end. Transverse furrow narrow, slightly spiral with shallow margins. Longitudinal furrow extends towards the antapex. The boundaries of the plates are provided with a low ribbing with spines along its edges; the size of the spines increase considerably towards the corners where the plates join and particulary on the apical part of the theca. Surface armour finely granular, color yellow. The arrangement of the plates is the same as in the holotype.
Affinities:
Vozzhennikova, 1967, p. 122: This species differs from all other members of the genus in having spines on the ribbed processes delimiting the plates.
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Cribroperidinium edwardsii (Cookson and Eisenack, 1958) Davey, 1969a, has a thick wall, and an epicyst with a long, stiff, pointed and sometimes curved horn. The longitudinal furrow is broad. The paraplates are finely granular. The parasutures often bear a few, rather broad, pointed spines, especially in the apical and antapical regions. Size: 143 µm by 125 µm overall for type
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Cribroperidinium ?edwardsii (Cookson and Eisenack, 1958, p.32, pl.3, figs.5–6; text-fig.7) Davey, 1969a, p.128. Holotype: Cookson and Eisenack, 1958, pl.3, fig.6; text-fig.7; Jan du Chêne et al., 1986a, pl.32, fig.4; pl.33, fig.3. Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly Cribroperidinium, fourthly (and now) Cribroperidinium?. Questionable assignment: Helenes (1984, p.125) as a problematic species. Taxonomic junior synonyms: Gonyaulax (now Cribroperidinium) apione, according to Burger (1980a, p.82) — however, Jan du Chêne et al. (1986a, p.76) retained Cribroperidinium apione; Gonyaulax (as Cribroperidinium) orthoceras, according to Davey and Verdier (1971, p.17) — however, Below (1981a, p.39–40) and Lentin and Williams (1985, p.79) retained Cribroperidinium orthoceras. Age: Albian–early Turonian.
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Original description: Cookson and Eisenack, 1958, p.32-33: Gonyaulax edwardsii
Shell nearly sphaerical, thick walled. Epitheca with a long, stiff, pointed and sometimes curved horn. Girdle helicoid, narrow with low borders; longitudinal furrow broad. Plates finely granular, the inner surface of girdle sometimes more coarsely granular than plates. Sutures of the plates with low, thin ledges which often bear a few rather broad, pointed spines especially in the apical and antapical regions.
Dimensions: Type 143x125 µm overall.
Supplemental description: Vozzhennikova, 1967, p.122
Theca almost sphaerical, thickwalled. Epitheca with a long bluntly ended apical horn. Hypotheca broadly rounded at the posterior end. Transverse furrow narrow, slightly spiral with shallow margins. Longitudinal furrow extends towards the antapex. The boundaries of the plates are provided with a low ribbing with spines along its edges; the size of the spines increase considerably towards the corners where the plates join and particulary on the apical part of the theca. Surface armour finely granular, color yellow. The arrangement of the plates is the same as in the holotype.
Affinities:
Vozzhennikova, 1967, p. 122: This species differs from all other members of the genus in having spines on the ribbed processes delimiting the plates.
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Cribroperidinium edwardsii (Cookson and Eisenack, 1958) Davey, 1969a, has a thick wall, and an epicyst with a long, stiff, pointed and sometimes curved horn. The longitudinal furrow is broad. The paraplates are finely granular. The parasutures often bear a few, rather broad, pointed spines, especially in the apical and antapical regions. Size: 143 µm by 125 µm overall for type
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