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Indodinium
From Fensome et al., 2019:
Indodinium, Kumar, 1986b, p.388–389. This name was not validly published in Kumar (1984, p.26), who did not provide a description.
Type: Kumar, 1986b, pl.4, fig.3, as Indodinium khariense.
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Original description: [Kumar, 1986]:
Diagnosis:
Cyst circumcavate, elongate and beaker shaped in dorsoventral view.
Paratabulation features are only partially developed. An apical archaeopyle type (A) and six precingular paraplates are present. Faintly marked paracingulum and short parasulcus in the hypocystal region are only sometimes present. The hypocystal region is without any paratabulation features and is slightly larger than the epicyst.
The periphragm is thin, psilate and might develop one or two antapical protrusions. The endophragm is thick and has striate, granulate or verrucate ornamentation. The partial or complete absence of ornamentation on the endophragm marks the presence of the paracingulum and parasulcus, if at all present. Periphragm and endophragm are in contact only near the antapical end.
Affinities:
Indodinium differs from Wallodinium in being circumcavate rather than bicavate, and in having partial paratabulation features and antapical protrusions, which are absent in Wallodinium. Indodinium also differs from Boreocysta in developing partial paratabulation features which are absent in Boreocysta. Further Boreocysta is elongate ellipsoidal in shape, whereas Indodinium is beaker-shaped. The genus Omatia differs from Indodinium in having a well developed gonyaulacacean paratabulation with a precingular archaeopyle.
Indodinium, Kumar, 1986b, p.388–389. This name was not validly published in Kumar (1984, p.26), who did not provide a description.
Type: Kumar, 1986b, pl.4, fig.3, as Indodinium khariense.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Kumar, 1986]:
Diagnosis:
Cyst circumcavate, elongate and beaker shaped in dorsoventral view.
Paratabulation features are only partially developed. An apical archaeopyle type (A) and six precingular paraplates are present. Faintly marked paracingulum and short parasulcus in the hypocystal region are only sometimes present. The hypocystal region is without any paratabulation features and is slightly larger than the epicyst.
The periphragm is thin, psilate and might develop one or two antapical protrusions. The endophragm is thick and has striate, granulate or verrucate ornamentation. The partial or complete absence of ornamentation on the endophragm marks the presence of the paracingulum and parasulcus, if at all present. Periphragm and endophragm are in contact only near the antapical end.
Affinities:
Indodinium differs from Wallodinium in being circumcavate rather than bicavate, and in having partial paratabulation features and antapical protrusions, which are absent in Wallodinium. Indodinium also differs from Boreocysta in developing partial paratabulation features which are absent in Boreocysta. Further Boreocysta is elongate ellipsoidal in shape, whereas Indodinium is beaker-shaped. The genus Omatia differs from Indodinium in having a well developed gonyaulacacean paratabulation with a precingular archaeopyle.