Back
Gonyaulacysta granuligera
Gonyaulacysta "granuligera" (Klement, 1960, p.41-42, pl.5, figs.4-5) Sarjeant, 1969, p.10. Emendation: Sarjeant, 1984a, p.156, as Cryptarchaeodinium granuligerum.
Holotype: Klement, 1960, pl.5, figs.4-5; Sarjeant, 1984a, pl.1, figs.3-4; text-fig.1; Jan du Chêne et al., 1986a, pl.27, figs.11-14.
NOW Cribroperidinium. Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly (and now) Cribroperidinium, fourthly Rhynchodiniopsis, fifthly Cryptarchaeodinium, sixthly Acanthaulax. Taxonomic senior synonym: Gonyaulax (as Gonyaulacysta) granulata, according to Fisher and Riley (1980, p.321) - however, Sarjeant (1984a, p.156) retained Gonyaulacysta (as Cribroperidinium) granuligera. This combination was not validly published in Sarjeant (1966b, p.131), since that author did not fully reference the basionym.
Age: Mid Oxfordian-Early Kimmeridgian.
Supplemental description: Gitmez, 1970, p.257
Shell subspherical to elongate, with a long apical horn. Tabulation: 4", 6"", 6c, 6""", 1"""". Cingulum narrow and laevorotatory, dividing the shell into two unequal parts: epitract longer than the hypotract. Plate boundaries spiny; spines short, solid and distally acute or blunt. Precingular archaeopyle forms by loss of the plate 3". Surface densely granular.
Dimensions: Figured specimen: overall length 73 µm, breadth 65 µm; horn length 8 µm; length of the spines 1-3 µm. Range of the English specimens (15 specimens measured): overall length 65-73 µm, breadth 50-75 µm. French specimens (25 specimens measured): overall length 68-72 µm, breadth 60-65 µm.
Holotype: Klement, 1960, pl.5, figs.4-5; Sarjeant, 1984a, pl.1, figs.3-4; text-fig.1; Jan du Chêne et al., 1986a, pl.27, figs.11-14.
NOW Cribroperidinium. Originally Gonyaulax (Appendix B), subsequently Gonyaulacysta, thirdly (and now) Cribroperidinium, fourthly Rhynchodiniopsis, fifthly Cryptarchaeodinium, sixthly Acanthaulax. Taxonomic senior synonym: Gonyaulax (as Gonyaulacysta) granulata, according to Fisher and Riley (1980, p.321) - however, Sarjeant (1984a, p.156) retained Gonyaulacysta (as Cribroperidinium) granuligera. This combination was not validly published in Sarjeant (1966b, p.131), since that author did not fully reference the basionym.
Age: Mid Oxfordian-Early Kimmeridgian.
Supplemental description: Gitmez, 1970, p.257
Shell subspherical to elongate, with a long apical horn. Tabulation: 4", 6"", 6c, 6""", 1"""". Cingulum narrow and laevorotatory, dividing the shell into two unequal parts: epitract longer than the hypotract. Plate boundaries spiny; spines short, solid and distally acute or blunt. Precingular archaeopyle forms by loss of the plate 3". Surface densely granular.
Dimensions: Figured specimen: overall length 73 µm, breadth 65 µm; horn length 8 µm; length of the spines 1-3 µm. Range of the English specimens (15 specimens measured): overall length 65-73 µm, breadth 50-75 µm. French specimens (25 specimens measured): overall length 68-72 µm, breadth 60-65 µm.