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Chatangiella bondarenkoi
Chatangiella bondarenkoi, (Vozzhennikova, 1967), Lentin and Williams, 1976; Emendations: Lentin and Vozzhennikova, 1990, p.41 and Lebedeva in Ilyina et al., 1994, p.68-69, both as Chatangiella bondarenkoi.
Tax. sr. synonym of Chatangiella chetiensis (Vozzhennikova, 1967) Lentin and Williams, 1976, and of Chatangiella obtusa Lebedeva, 1988, according to Lentin and Vozzhennikova, 1990.
Holotype: Vozzhennikova, 1967, pl.59, fig.1b, pl.60, fig.2; Lentin and Vozzhennikova, 1990, pl.4, figs.6-7, text-fig.17
Locus typicus: Khatanga depression (Northern Siberia), Russia
Stratum typicum: Santonian
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Original description as Australiella bondarenkoi: [Vozzhennikova, 1967, p.130-131]: (Translation: Lentin and Vozzhennikova, 1990):
Description:
Theca elongated along the longitudinal axis, somewhat convex equatorially and tapering towards the poles. Epitheca on the level of the upper edge of the internal body, truncated or not truncated. Apical margin broadly rounded with a short, bluntending apical horn. Hypotheca with straight or slightly concave sides and with a single broadly or narrowly conical antapical horn situated at one side of the antapical margin. The other side of the antapical margin is obliquely truncated or lies parallel with the equatorial plane. Transverse furrow equatorial slightly deflected to the left. Margin of furrow delineated by short, blunt terminated outgrowths. Longitudinal furrow represented by a depression running from the end of the transverse furrow to the antapex. Internal body large, oval and with its lateral walls closely applied to the sides of the theca. The walls of the internal body are thicker at the poles than elsewhere. The surface of the internal body and of the theca is granulose. Pylome ovally polygonal and corresponding in position to plate 3cr.
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Emended description:
Lentin and Vozzhennikova, 1990, p.41:
Description:
Cyst longitudinally elongate, rounded rectangular outline with a short apical horn; antapex nearly flat with two poorly developed antapical horns, occasionally the left antapical horn may be more developed; endocyst round to roundly rectangular in outline, dividing the cyst equally; bicavate. Periphragm granulose with occasional small spines; endocyst densely granulose with thickened apical and antapical margins within the epi- and hypopericoels, thickenings appear to be fibrous.
Paratabulation peridinioid, indicated by periarcheopyle and paracingulum only.
The periarcheopyle is iso-omegaform with the 4" - 2a suture about one half the length of the 2a - 3 suture, operculum remains attached; the endoarcheopyle is not developed on the holotype;
an opisthopyle may be formed by an arcuate suture on the mid-ventral surface of the hypocyst.
The paracingulum is outlined by parallel ridges of dense granulations with occasional spines, faintly pentapartite.
Parasulcus indicated by a faint depression on the hypocyst.
Dimensions:
Holotype 148 µm long, 7 µm wide; range 127-150 µm long and 51-73 µm wide.
Tax. sr. synonym of Chatangiella chetiensis (Vozzhennikova, 1967) Lentin and Williams, 1976, and of Chatangiella obtusa Lebedeva, 1988, according to Lentin and Vozzhennikova, 1990.
Holotype: Vozzhennikova, 1967, pl.59, fig.1b, pl.60, fig.2; Lentin and Vozzhennikova, 1990, pl.4, figs.6-7, text-fig.17
Locus typicus: Khatanga depression (Northern Siberia), Russia
Stratum typicum: Santonian
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Original description as Australiella bondarenkoi: [Vozzhennikova, 1967, p.130-131]: (Translation: Lentin and Vozzhennikova, 1990):
Description:
Theca elongated along the longitudinal axis, somewhat convex equatorially and tapering towards the poles. Epitheca on the level of the upper edge of the internal body, truncated or not truncated. Apical margin broadly rounded with a short, bluntending apical horn. Hypotheca with straight or slightly concave sides and with a single broadly or narrowly conical antapical horn situated at one side of the antapical margin. The other side of the antapical margin is obliquely truncated or lies parallel with the equatorial plane. Transverse furrow equatorial slightly deflected to the left. Margin of furrow delineated by short, blunt terminated outgrowths. Longitudinal furrow represented by a depression running from the end of the transverse furrow to the antapex. Internal body large, oval and with its lateral walls closely applied to the sides of the theca. The walls of the internal body are thicker at the poles than elsewhere. The surface of the internal body and of the theca is granulose. Pylome ovally polygonal and corresponding in position to plate 3cr.
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Emended description:
Lentin and Vozzhennikova, 1990, p.41:
Description:
Cyst longitudinally elongate, rounded rectangular outline with a short apical horn; antapex nearly flat with two poorly developed antapical horns, occasionally the left antapical horn may be more developed; endocyst round to roundly rectangular in outline, dividing the cyst equally; bicavate. Periphragm granulose with occasional small spines; endocyst densely granulose with thickened apical and antapical margins within the epi- and hypopericoels, thickenings appear to be fibrous.
Paratabulation peridinioid, indicated by periarcheopyle and paracingulum only.
The periarcheopyle is iso-omegaform with the 4" - 2a suture about one half the length of the 2a - 3 suture, operculum remains attached; the endoarcheopyle is not developed on the holotype;
an opisthopyle may be formed by an arcuate suture on the mid-ventral surface of the hypocyst.
The paracingulum is outlined by parallel ridges of dense granulations with occasional spines, faintly pentapartite.
Parasulcus indicated by a faint depression on the hypocyst.
Dimensions:
Holotype 148 µm long, 7 µm wide; range 127-150 µm long and 51-73 µm wide.