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Scriniodinium indicum
Scriniodinium "indicum" Jain and Garg in Jain et al., 1984, p.72–73, pl.2, figs.22–23. Holotype: Jain et al., 1984, pl.2, fig.22. NOW Endoscrinium. Originally Scriniodinium, subsequently (and now) Endoscrinium. Age: Kimmeridgian–early Tithonian.
Original diagnosis: Jain and Garg, 1984, p.72
Cyst circumcavate, outline variable, mostly broadly triangular, sometimes squarish to rounded, central body broadly triangular, follows shape of cyst outline, pericyst smaller than hypocyst divided by an annular paracingulum; apical and antapical horns absent; endophragm thick, periphragm thin, ornamentation on both not discernible. Archaeopyle precingular (3~), trapeziform, both periphagm and endophragm involved in its formation.
Dimensions:
Overall cyst size : 85- 104 x 85- 100 µm. Cyst body diameter: 60-66 µm.
Periphragm extension beyond body margin: 8-26 µm.
Affinities:
Jain and Garg, 1984, p.72: Scriniodinium indicum Jain and Garg compares best with S. attadalense in having unequal epi-and hypo-cysts and central body following the periphragm outline, but differs in being broadly triangular and not possessing any antapical opening. S. crystallinum differs in its equal epiand hypo-cyst portions and rounded antapex. The involvement of periphragm and endophragm in the formation of archaeopyle distinguishes this species from others of the genus except for S. rostratum which differs in the absence of "Beak like" apex.
Original diagnosis: Jain and Garg, 1984, p.72
Cyst circumcavate, outline variable, mostly broadly triangular, sometimes squarish to rounded, central body broadly triangular, follows shape of cyst outline, pericyst smaller than hypocyst divided by an annular paracingulum; apical and antapical horns absent; endophragm thick, periphragm thin, ornamentation on both not discernible. Archaeopyle precingular (3~), trapeziform, both periphagm and endophragm involved in its formation.
Dimensions:
Overall cyst size : 85- 104 x 85- 100 µm. Cyst body diameter: 60-66 µm.
Periphragm extension beyond body margin: 8-26 µm.
Affinities:
Jain and Garg, 1984, p.72: Scriniodinium indicum Jain and Garg compares best with S. attadalense in having unequal epi-and hypo-cysts and central body following the periphragm outline, but differs in being broadly triangular and not possessing any antapical opening. S. crystallinum differs in its equal epiand hypo-cyst portions and rounded antapex. The involvement of periphragm and endophragm in the formation of archaeopyle distinguishes this species from others of the genus except for S. rostratum which differs in the absence of "Beak like" apex.