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Scriniodinium echinatum
Scriniodinium echinatum Jain and Garg in Jain et al., 1984
Holotype: Jain et al., 1984, pl.2, fig.21
Locus typicus: Malla Johar area, Pithoragarh district, U.P., India
Stratum typicum: Kimmeridgian--early Tithonian
Original diagnosis: Jain and Garg, 1984, p.73
Cyst circumcavate, outline more or less square shaped, epicyst smaller than hypocyst; paracingulum annular, central body large, spherical, occupy central portion; endophragm thick, periphragm echinate, extends apically, antapically and laterally forming distinct apical, antapical and lateral projections appearing like horns. Antapical projection truncate, giving a pentagonal appearance to cyst outline Archaepyle large, trapeziform, precingular (3"").
Dimensions:HolotypeRange
Overall cyst size 100 x90 µm 90-100 µm
Central body diameter 64 µm 85-90 µm
Periphragm extension
beyond central body margin up to 16 µm 14-20 µm
Affinities:
Jain and Garg, 1984, p.73: S. echinatum Jain and Garg compares best with S. attadelense in having squarish cyst outline, but differs in having spherical capsule not following the shape of cyst outline and echinate periphragm.
Holotype: Jain et al., 1984, pl.2, fig.21
Locus typicus: Malla Johar area, Pithoragarh district, U.P., India
Stratum typicum: Kimmeridgian--early Tithonian
Original diagnosis: Jain and Garg, 1984, p.73
Cyst circumcavate, outline more or less square shaped, epicyst smaller than hypocyst; paracingulum annular, central body large, spherical, occupy central portion; endophragm thick, periphragm echinate, extends apically, antapically and laterally forming distinct apical, antapical and lateral projections appearing like horns. Antapical projection truncate, giving a pentagonal appearance to cyst outline Archaepyle large, trapeziform, precingular (3"").
Dimensions:HolotypeRange
Overall cyst size 100 x90 µm 90-100 µm
Central body diameter 64 µm 85-90 µm
Periphragm extension
beyond central body margin up to 16 µm 14-20 µm
Affinities:
Jain and Garg, 1984, p.73: S. echinatum Jain and Garg compares best with S. attadelense in having squarish cyst outline, but differs in having spherical capsule not following the shape of cyst outline and echinate periphragm.