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Vozzhennikovia cearaichia
From Fensome et al., 2019:
Vozzhennikovia cearaichia Stover and Hardenbol, 1994, p.39, pl.12, figs.78a–b,79.
Holotype: Stover and Hardenbol, 1994, pl.12, fig.79.
Age: Rupelian.
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Original description (Stover & Hardenbol, 1994):
Vozzhennikovia cearaichia sp. nov.
Plate 12, Figures 78a-b, 79
Description: Proximate peridiniacean, cornucavate cysts with short apical and left antapical horns. Right antapical horn absent or poorly developed. Endocyst smooth, more or less circular in outline, appressed to periphragm almost everywhere and usually discernible only at the bases of the apical and left antapical horns. Periphragm also thin, outline roundly peridinioid, lateral margins moderately convex, antapical margins straight or nearly so. Surface minutely wrinkled with sparse, seemingly randomly disposed, scattered denticulations. Accumulation bodies commonly present within cysts. Paratabulation indicated by middorsal intercalary archeopyle, when discernible, and a weakly developed paracingulum expressed by faint folds and/or very low ridges. Monoplacoid operculum generally in place, otherwise partly displaced and adherent posteriorly, or rarely released entirely. Other indications of paratabulation absent.
Size: intermediate; 50 to 56 µm, width 53 to 58 µm.
Comparison: Vozzhennikovia cearaichia differs from V. spinula by having finer ornamentation, a less well defined paracingulum and a more round outline.
Types: Holotype: Plate 12, figure 79. Paratype: Plate 12, figures 78a-b. Both specimens are from the Boom Composite Sample at 44.20 meters (= Cored Reconnaissance Hole sample at a drill depth of 37.56 meters).
Occurrence: This species in abundant in the Putte Member of the Boom Formation at the 44.20 meter level in the composite section.
Vozzhennikovia cearaichia Stover and Hardenbol, 1994, p.39, pl.12, figs.78a–b,79.
Holotype: Stover and Hardenbol, 1994, pl.12, fig.79.
Age: Rupelian.
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Original description (Stover & Hardenbol, 1994):
Vozzhennikovia cearaichia sp. nov.
Plate 12, Figures 78a-b, 79
Description: Proximate peridiniacean, cornucavate cysts with short apical and left antapical horns. Right antapical horn absent or poorly developed. Endocyst smooth, more or less circular in outline, appressed to periphragm almost everywhere and usually discernible only at the bases of the apical and left antapical horns. Periphragm also thin, outline roundly peridinioid, lateral margins moderately convex, antapical margins straight or nearly so. Surface minutely wrinkled with sparse, seemingly randomly disposed, scattered denticulations. Accumulation bodies commonly present within cysts. Paratabulation indicated by middorsal intercalary archeopyle, when discernible, and a weakly developed paracingulum expressed by faint folds and/or very low ridges. Monoplacoid operculum generally in place, otherwise partly displaced and adherent posteriorly, or rarely released entirely. Other indications of paratabulation absent.
Size: intermediate; 50 to 56 µm, width 53 to 58 µm.
Comparison: Vozzhennikovia cearaichia differs from V. spinula by having finer ornamentation, a less well defined paracingulum and a more round outline.
Types: Holotype: Plate 12, figure 79. Paratype: Plate 12, figures 78a-b. Both specimens are from the Boom Composite Sample at 44.20 meters (= Cored Reconnaissance Hole sample at a drill depth of 37.56 meters).
Occurrence: This species in abundant in the Putte Member of the Boom Formation at the 44.20 meter level in the composite section.