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Scriniodinium luridum
Scriniodinium luridum (Deflandre, 1938) Klement, 1960
Now Endoscrinium. Originally Gymnodinium, subsequently Scriniodinium, thirdly (and now) Endoscrinium, fourthly Tubotuberella Jan du Chene et al., 1986 retained this species in Scriniodinium; however, Lentin and Williams, 1989 retained it in Endoscrinium (Klement, 1960) Vozzhennikova, 1967.
Holotype: Deflandre, 1938, pl.5, figs.4-5; Jan du Chene et al., 1986, pl.109, figs.6-8
Age: Early Oxfordian
Supplemental description: Pocock, 1972, p.91
Theca comprises an irregularly spheroidal capsule enclosed in a thin outer wall; dorsoventrally flattened; outer wall carries a fairly prominent transverse furrow; longitudinal furrow and plating obscure; tabulation indeterminate; hypothecal extension of outer wall asymmetric; extending about 6.0 µm apically of the capsule; epithecal extensions double and of different sizes, extending about 3.0 µm and 5.0 µm apically of the capsule; archeopyle precingular; capsule about 1.0 µm thick; smooth to scabrate; outer wall less than 0.5 µm thick; smooth and transparent; color of capsule amber; length of theca 63.0 (72.3) 80.0 µm; width of theca 55.0 (66.3) 74.0 µm; length of capsule 48.0 (57.0) 63.0 µm; width of capsule 40.0 (58.0) 62.0 µm.
Affinities:
Pocock, 1972, p.91: This species appears to correspond closely with Deflandre's original description and figures of G. Iuridum, and with Sarjeant's photographs of specimens assigned to the same species. The grains assigned to S. Iuridum by Klement (1960, pp.21-22, pl.1, figs.2--3) may represent a distinct species.
Now Endoscrinium. Originally Gymnodinium, subsequently Scriniodinium, thirdly (and now) Endoscrinium, fourthly Tubotuberella Jan du Chene et al., 1986 retained this species in Scriniodinium; however, Lentin and Williams, 1989 retained it in Endoscrinium (Klement, 1960) Vozzhennikova, 1967.
Holotype: Deflandre, 1938, pl.5, figs.4-5; Jan du Chene et al., 1986, pl.109, figs.6-8
Age: Early Oxfordian
Supplemental description: Pocock, 1972, p.91
Theca comprises an irregularly spheroidal capsule enclosed in a thin outer wall; dorsoventrally flattened; outer wall carries a fairly prominent transverse furrow; longitudinal furrow and plating obscure; tabulation indeterminate; hypothecal extension of outer wall asymmetric; extending about 6.0 µm apically of the capsule; epithecal extensions double and of different sizes, extending about 3.0 µm and 5.0 µm apically of the capsule; archeopyle precingular; capsule about 1.0 µm thick; smooth to scabrate; outer wall less than 0.5 µm thick; smooth and transparent; color of capsule amber; length of theca 63.0 (72.3) 80.0 µm; width of theca 55.0 (66.3) 74.0 µm; length of capsule 48.0 (57.0) 63.0 µm; width of capsule 40.0 (58.0) 62.0 µm.
Affinities:
Pocock, 1972, p.91: This species appears to correspond closely with Deflandre's original description and figures of G. Iuridum, and with Sarjeant's photographs of specimens assigned to the same species. The grains assigned to S. Iuridum by Klement (1960, pp.21-22, pl.1, figs.2--3) may represent a distinct species.