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Palaeocystodinium teespinosum
From Fensome et al., 2019:
Palaeocystodinium teespinosum Fensome et al., 2009, p.50, pl.8, figs.m–p. Holotype: Fensome et al., 2009, pl.8, figs.m–n. Age: last
occurrence, middle Rupelian.
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Originals description (Fensome et al., 2009):
Palaeocystodinium teespinosum sp. nov. (Plate 8, figs m-p)
Holotype: Plate 8, figs m-n; from a cuttings sample at 1041-1050 m (3415-3446 feet) in Onondaga E-84 well; GSC type collection no. 130271, sample P27, slide 10, coordinates 15.8 × 101.7, England Finder P45/3. Overall length 199 μm, overall breadth 34 μm, endocyst length 79 μm, endocyst breadth 32 μm. The age determined for the sample from which the holotype was recovered is middle-late Eocene; however, since it is a cuttings sample and no FAD has been determined for the species, the holotype is a specimen probably caved down well from a younger stratum.
AGE ON SCOTIAN MARGIN. LAD: middle Rupelian (Early Oligocene).
Description: A species of Palaeocystodinium with a long, fusiform shape, long pointed horns, and small, delicate T-shaped spinelets adorning the periphragm; these spine lets are most common on the horns. There is no accessory antapical horn. Generally circumcavate, with cavation mainly developed in the polar regions; pericoel very narrow laterally.
Size: Overall length 142(198)252μm, overall breadth 33(34)34μm, endocyst length 64(75)82μm, endocyst breadth 32(32)32μm, spinelets generally about 2μm long or less; 3 specimens measured.
Remarks: This new species differs from Palaeocystodinium golzowense in its possession of delicate spinelets. Palaeocystodinium benjaminii has similar spinelets, but additionally has an accessory horn.
Palaeocystodinium teespinosum Fensome et al., 2009, p.50, pl.8, figs.m–p. Holotype: Fensome et al., 2009, pl.8, figs.m–n. Age: last
occurrence, middle Rupelian.
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Originals description (Fensome et al., 2009):
Palaeocystodinium teespinosum sp. nov. (Plate 8, figs m-p)
Holotype: Plate 8, figs m-n; from a cuttings sample at 1041-1050 m (3415-3446 feet) in Onondaga E-84 well; GSC type collection no. 130271, sample P27, slide 10, coordinates 15.8 × 101.7, England Finder P45/3. Overall length 199 μm, overall breadth 34 μm, endocyst length 79 μm, endocyst breadth 32 μm. The age determined for the sample from which the holotype was recovered is middle-late Eocene; however, since it is a cuttings sample and no FAD has been determined for the species, the holotype is a specimen probably caved down well from a younger stratum.
AGE ON SCOTIAN MARGIN. LAD: middle Rupelian (Early Oligocene).
Description: A species of Palaeocystodinium with a long, fusiform shape, long pointed horns, and small, delicate T-shaped spinelets adorning the periphragm; these spine lets are most common on the horns. There is no accessory antapical horn. Generally circumcavate, with cavation mainly developed in the polar regions; pericoel very narrow laterally.
Size: Overall length 142(198)252μm, overall breadth 33(34)34μm, endocyst length 64(75)82μm, endocyst breadth 32(32)32μm, spinelets generally about 2μm long or less; 3 specimens measured.
Remarks: This new species differs from Palaeocystodinium golzowense in its possession of delicate spinelets. Palaeocystodinium benjaminii has similar spinelets, but additionally has an accessory horn.