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Dinogymnium undulosum
From Fensome et al., 2019:
Dinogymnium undulosum Cookson and Eisenack, 1970a, p.138, pl.10, fig.3. Holotype: Cookson and Eisenack, 1970a, pl.10, fig.3. Herngreen (1975, p.63) implied that Gymnodinium (as Dinogymnium) denticulatum is the possible taxonomic senior synonym of this species. Age: Senonian.
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Original description: Cookson and Eisenack, 1970, p.138
Epitheca and hypotheca of nearly equal length with rounded apices, that of the hypotheca being the more strongly so, and clearly ornamented with wavy longitudinal ridges. Girdle prominent, circular in outline, rather shallow but with well-defined limits. The longitudinal furrow, which is present on both epitheca and hypotheca, narrows distally but does not extend to the poles.
Dimensions: Holotype, c. 64 µm long, 34 µm broad. Range of four examples: length 52-70 µm, breadth 27-38 µm.
Dinogymnium undulosum Cookson and Eisenack, 1970a, p.138, pl.10, fig.3. Holotype: Cookson and Eisenack, 1970a, pl.10, fig.3. Herngreen (1975, p.63) implied that Gymnodinium (as Dinogymnium) denticulatum is the possible taxonomic senior synonym of this species. Age: Senonian.
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Original description: Cookson and Eisenack, 1970, p.138
Epitheca and hypotheca of nearly equal length with rounded apices, that of the hypotheca being the more strongly so, and clearly ornamented with wavy longitudinal ridges. Girdle prominent, circular in outline, rather shallow but with well-defined limits. The longitudinal furrow, which is present on both epitheca and hypotheca, narrows distally but does not extend to the poles.
Dimensions: Holotype, c. 64 µm long, 34 µm broad. Range of four examples: length 52-70 µm, breadth 27-38 µm.