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.  NOW Wilsonidium?.  Originally Wetzeliella, subsequently (and now) Wilsonidium?, thirdly Wetzeliella?, fourthly Spinidinium.  Age: Paleocene.

Parent: Spinidinium