Wilsonidium ornatum
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ornatum (Wilson, 1967c, p.481–482, figs.33–34) Lentin and Williams, 1976, p.139. Holotype: Wilson, 1967c, fig.33. Originally Wetzeliella, subsequently (and now) Wilsonidium, thirdly Rhombodinium?. Lentin and Williams (1981, p.244) retained this species in Wilsonidium. Age: early Eocene.