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Spinidinium sagittula
From Fensome et al., 2019:
Spinidinium ?sagittula (Drugg, 1970b, p.809–810, figs.1A–C) Lentin and Williams, 1976, p.64. Holotype: Drugg, 1970b, fig.1A. Originally Deflandrea, subsequently Spinidinium, thirdly (and now) Spinidinium? Questionable assignment: Sluijs et al. (2009, p.48). NIA. Age: Early Eocene.
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Description: Drugg 1970b, p. 809-810: Deflandrea sagittula
Tract arrow-shaped, epitract larger than hypotract. The cingulum is located low on the tract and is delineated by low ledges ornamented with short processes. Wall thin, two-layered, the endophragm forming a capsule with the periphragm usually closely appressed except in the area of the horns. The two antapical horns are about equal in size. Dorsal intercalary archeopyle of trapezoidal shape present in both endophragm and periphragm. The tract is ornamented with short processes (2 to 8µm) which possess blunt to faintly capitate distal terminations. The overall length of this species ranges from 81 to 103µm and the width from 64 to 741µm.
Remarks: This species differs from Deflandrea longispinosa WiLson, 1968, in that the processes are shorter and the ambitus is more arrow-shaped. It resembles D. wetzeli Morgenroth, 1966, in the placement of the cingulumbut differs in possessing much more pronounced ornamentation.
Spinidinium ?sagittula (Drugg, 1970b, p.809–810, figs.1A–C) Lentin and Williams, 1976, p.64. Holotype: Drugg, 1970b, fig.1A. Originally Deflandrea, subsequently Spinidinium, thirdly (and now) Spinidinium? Questionable assignment: Sluijs et al. (2009, p.48). NIA. Age: Early Eocene.
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Description: Drugg 1970b, p. 809-810: Deflandrea sagittula
Tract arrow-shaped, epitract larger than hypotract. The cingulum is located low on the tract and is delineated by low ledges ornamented with short processes. Wall thin, two-layered, the endophragm forming a capsule with the periphragm usually closely appressed except in the area of the horns. The two antapical horns are about equal in size. Dorsal intercalary archeopyle of trapezoidal shape present in both endophragm and periphragm. The tract is ornamented with short processes (2 to 8µm) which possess blunt to faintly capitate distal terminations. The overall length of this species ranges from 81 to 103µm and the width from 64 to 741µm.
Remarks: This species differs from Deflandrea longispinosa WiLson, 1968, in that the processes are shorter and the ambitus is more arrow-shaped. It resembles D. wetzeli Morgenroth, 1966, in the placement of the cingulumbut differs in possessing much more pronounced ornamentation.