Spinidinium rugosum

rugosum (Stanley, 1965, p.222–223, pl.21, figs.6–11) Costa and Downie, 1979, p.45.  Holotype: Stanley, 1965, pl.21, figs.10–11.  Originally Wetzeliella, subsequently Wilsonidium?, thirdly Wetzeliella?, fourthly (and now) Spinidinium. Williams et al. (2015, p.318) retained this species in Spinidinium.  Age: Paleocene.

Parent: Spinidinium