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Vozzhennikovia tenera
From Fensome et al., 2019:
Vozzhennikovia tenera (Krutzsch, 1962) Lentin and Williams, 1976
Now Geiselodinium. Originally Deflandrea?, subsequently Vozzhennikovia, thirdly Dioxya, fourthly (and now) Geiselodinium.
Morgan, 1977, transferred this species to Dioxya Cookson and Eisenack, 1958. Lentin and Williams, 1981, retained it in Vozzhennikovia.
Holotype: Krutzsch, 1962, pl.11, figs.20-22
Age: Middle Eocene
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Original diagnosis: Krutzsch, 1962, p. 44-45
A delicately walled Deflandrea species with only weakly developed horns, which hardly show in the more or less circular outline.
Transverse furrow broad, clear. Longitudinal furrow narrow, less distinct than transverse furrow. Shell closely appressed to central body. Central body almost smooth, shell set with irregular small putules. No archaeopyle identifiable. Wrinkles rare. No tabulation.
Size: 50-55 Ám. Central body but slightly smaller (1 specimen).
Affinities: Krutzsch, 1962, p. 45: D. tenera differs from other Deflandrea species in the circular outline, the closely appressed shell, and the poorly developed horns.
Vozzhennikovia tenera (Krutzsch, 1962) Lentin and Williams, 1976
Now Geiselodinium. Originally Deflandrea?, subsequently Vozzhennikovia, thirdly Dioxya, fourthly (and now) Geiselodinium.
Morgan, 1977, transferred this species to Dioxya Cookson and Eisenack, 1958. Lentin and Williams, 1981, retained it in Vozzhennikovia.
Holotype: Krutzsch, 1962, pl.11, figs.20-22
Age: Middle Eocene
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Original diagnosis: Krutzsch, 1962, p. 44-45
A delicately walled Deflandrea species with only weakly developed horns, which hardly show in the more or less circular outline.
Transverse furrow broad, clear. Longitudinal furrow narrow, less distinct than transverse furrow. Shell closely appressed to central body. Central body almost smooth, shell set with irregular small putules. No archaeopyle identifiable. Wrinkles rare. No tabulation.
Size: 50-55 Ám. Central body but slightly smaller (1 specimen).
Affinities: Krutzsch, 1962, p. 45: D. tenera differs from other Deflandrea species in the circular outline, the closely appressed shell, and the poorly developed horns.