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Saeptodinium tasmaniense
Saeptodinium tasmaniense Harris, 1974
Holotype: Harris, 1974, p.2, fig.1
Locus typicus: Mt. Bischoff, Tasmania
Stratum typicum: Late Oligocene-early Miocene
Original diagnosis: Harris, 1974, p.163
Cavate cysts of ovoidal to slightly peridinioid form. Endocorpus ovoidal enclosed by the pericorpus which has a weakly formed apical horn and two very small antapical bulges. Periphragm scabrate, Endophragm uniformly granulate. Tabulation not marked by ornament. Girdle indistinct or not marked. Archeopyle not observed. Apex provided with a thickened plug.
Original description: Harris, 1974, p.163
Epitract rounded triangular in outline, and hypotract rounded or with two rather sharp antapical bulges separated by a wide indentation 7-10 µm deep. Folding often obscures the antapical bulges giving either the impression of a rounded hypotract or one with single antapical prominence. Pericoel variable, 2-5 µm wide and dest in the antapical and apical regions. Mostly the periphragm lies close to the endophragm. Periphragm and endophragm of approximately equal thickness, 0.5-1 µm. Archeopyle formed possibly by splitting between hypo- and epitract.
Dimensions: Overall length 45 - 62 µm, overall breadth 42 - 58 µm.
Affinities:
Harris, 1974, p.163: This cyst type resembles S . gravattensis but is distinct in its ornament and shape of the hypotract. Both have a similar apical plug.
Holotype: Harris, 1974, p.2, fig.1
Locus typicus: Mt. Bischoff, Tasmania
Stratum typicum: Late Oligocene-early Miocene
Original diagnosis: Harris, 1974, p.163
Cavate cysts of ovoidal to slightly peridinioid form. Endocorpus ovoidal enclosed by the pericorpus which has a weakly formed apical horn and two very small antapical bulges. Periphragm scabrate, Endophragm uniformly granulate. Tabulation not marked by ornament. Girdle indistinct or not marked. Archeopyle not observed. Apex provided with a thickened plug.
Original description: Harris, 1974, p.163
Epitract rounded triangular in outline, and hypotract rounded or with two rather sharp antapical bulges separated by a wide indentation 7-10 µm deep. Folding often obscures the antapical bulges giving either the impression of a rounded hypotract or one with single antapical prominence. Pericoel variable, 2-5 µm wide and dest in the antapical and apical regions. Mostly the periphragm lies close to the endophragm. Periphragm and endophragm of approximately equal thickness, 0.5-1 µm. Archeopyle formed possibly by splitting between hypo- and epitract.
Dimensions: Overall length 45 - 62 µm, overall breadth 42 - 58 µm.
Affinities:
Harris, 1974, p.163: This cyst type resembles S . gravattensis but is distinct in its ornament and shape of the hypotract. Both have a similar apical plug.