Spinidinium rugosum
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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