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Palaeocystodinium teespinosum
Palaeocystodinium teespinosum Fensome et al., 2009, p.50, pl.8, figs.q–t.
Holotype: Fensome et al., 2009, pl.8, fig.r.
Age: youngest occurrence, middle Rupelian.
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.
Holotype: Fensome et al., 2009, pl.8, fig.r.
Age: youngest occurrence, middle Rupelian.
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.