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Dracodinium politum ssp. politum
Dracodinium politum ssp. politum
Autonym. Now redundant
Holotype: Williams and Downie, 1966b, pl.19, fig.9: see discussion under Dracodinium politum.
Locus typicus: Isle of Sheppey, Kent, England
Stratum typicum: Early Eocene
Original diagnosis: Bujak in Bujak et al., 1980, p. 29: Dracodinium politum
Pericyst ambitus subtriangular with a convex epipericyst. Apex rounded, occasionally with the suggestion of a small apical protrusion. Pericingular horns and left antapical horn well developed. Right antapical horn absent or denoted by a slight swelling of the pericyst. Length of epipericyst considerably less than length of hypopericyst. Endocyst ambitus circular. Pericoel well developed, being broad and continuous in ambital view. Periphragm smooth to chagrinate, without processes. Endophragm smooth or granulate, occasionally verrucate around the ambital periphery. Paratabulation indeterminate. Pericingulum only visible at the extremities of the pericingular horns. Perisulcus not seen. Periarchaeopyle resulting from the loss of the second anterior intercalary paraplate 2a. Perioperculum detached. Endoarchaeopyle of similar size and shape to the periarchaeopyle posteriorly, but does not underlie it anteriorly. Endoperculum detached.
Dimensions. Pericyst length 130-151 µm, breadth 140-168 µm. Endocyst length 66-80 µm, breadth 69-76 µm.
Autonym. Now redundant
Holotype: Williams and Downie, 1966b, pl.19, fig.9: see discussion under Dracodinium politum.
Locus typicus: Isle of Sheppey, Kent, England
Stratum typicum: Early Eocene
Original diagnosis: Bujak in Bujak et al., 1980, p. 29: Dracodinium politum
Pericyst ambitus subtriangular with a convex epipericyst. Apex rounded, occasionally with the suggestion of a small apical protrusion. Pericingular horns and left antapical horn well developed. Right antapical horn absent or denoted by a slight swelling of the pericyst. Length of epipericyst considerably less than length of hypopericyst. Endocyst ambitus circular. Pericoel well developed, being broad and continuous in ambital view. Periphragm smooth to chagrinate, without processes. Endophragm smooth or granulate, occasionally verrucate around the ambital periphery. Paratabulation indeterminate. Pericingulum only visible at the extremities of the pericingular horns. Perisulcus not seen. Periarchaeopyle resulting from the loss of the second anterior intercalary paraplate 2a. Perioperculum detached. Endoarchaeopyle of similar size and shape to the periarchaeopyle posteriorly, but does not underlie it anteriorly. Endoperculum detached.
Dimensions. Pericyst length 130-151 µm, breadth 140-168 µm. Endocyst length 66-80 µm, breadth 69-76 µm.