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Lithodinia superornata
Lithodinia "?superornata" (Wetzel, 1967a, p.869-870, pl.16, figs.8a-b) Fenton, 1981, p.253. Emendation: Sarjeant, 1980b, p.124-125, as Meiourogonyaulax superornata.
NOW Meiourogonyaulax. Originally Gonyaulax (Appendix B), subsequently (and now) Meiourogonyaulax, thirdly Gonyaulacysta, fourthly Lithodinia?. Questionable assignment: Williams et al. (1993, p.56).
Holotype: Wetzel, 1967a, pl.16, figs.8a-b; Sarjeant, 1980b, pl.1, figs.2-3; text-fig.4; Dietz et al., 1999, text-fig.5c.
Age: Late Bathonian.
Original description: Wetzel, 1967, p. 869-870
Diagnosis: A species of the genus Gonyaulax with very low epitheca (apex unknown because of shed apical calotte), with 6 trapezoidal pre-equatorial plates, an indented, laevorotatory girdle furrow and a weakly indicated longitudinal furrow with drop-shaped broadening on the hypotheca. The deeply chalice-shaped hypotheca has 6 post-equatorial plates, of which 1""" is very small, and 1 further intercalary and 1 antapical plate. The setting of the plate boundaries with high flanges seems specialised in that the flanges possess fence-like enforcements.
Dimensions: longitudinal diameter 70 µm. Holotype plus 5 incomplete specimens found.
NOW Meiourogonyaulax. Originally Gonyaulax (Appendix B), subsequently (and now) Meiourogonyaulax, thirdly Gonyaulacysta, fourthly Lithodinia?. Questionable assignment: Williams et al. (1993, p.56).
Holotype: Wetzel, 1967a, pl.16, figs.8a-b; Sarjeant, 1980b, pl.1, figs.2-3; text-fig.4; Dietz et al., 1999, text-fig.5c.
Age: Late Bathonian.
Original description: Wetzel, 1967, p. 869-870
Diagnosis: A species of the genus Gonyaulax with very low epitheca (apex unknown because of shed apical calotte), with 6 trapezoidal pre-equatorial plates, an indented, laevorotatory girdle furrow and a weakly indicated longitudinal furrow with drop-shaped broadening on the hypotheca. The deeply chalice-shaped hypotheca has 6 post-equatorial plates, of which 1""" is very small, and 1 further intercalary and 1 antapical plate. The setting of the plate boundaries with high flanges seems specialised in that the flanges possess fence-like enforcements.
Dimensions: longitudinal diameter 70 µm. Holotype plus 5 incomplete specimens found.