Rhadinodinium *politum (Bujak et al., 1980, p.29, pl.11, fig.1) Williams et al., 2015, p.309. Holotye: Williams and Downie, 1966b, pl.19, fig.9 (see discussion below), as Wetzeliella glabra; not Bujak et al., 1980, pl.11, fig.1 as indicated by Williams et al. (1998, p.204). Originally Dracodinium, subsequently (and now) Rhadinodinium. Aside from the fact that the holotype of Dracodinium (now Rhadinodinium) politum was incorrectly indicated in Williams et al. (1998), confusion is caused by the fact that the plates and captions in the originally-issued protologue publication were mixed up. Hence, in Williams and Downie (1966b, original issue), the holotype appears as pl.19, fig.9, opposite the caption labelled plate 19 but clearly intended for the plate labelled 20; the correct caption for the plate labelled 19 is opposite the plate labelled 20. In the 1983 issue of the monograph, these problems were corrected and the holotype of Dracodinium (now Rhadinodinium) politum is pl.20, fig.9. Age: early Eocene.

Original diagnosis: Bujak in Bujak et al., 1980, p. 29
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.