Wilsonidium rugosum

?rugosum (Stanley, 1965, p.222-223, pl.21, figs.6-11) Lentin and Williams, 1976, p.140.  Holotype: Stanley, 1965, pl.21, figs.10-11.  Originally Wetzeliella, subsequently (and now) Wilsonidium?, thirdly Wetzeliella?, fourthly Spinidinium.  Lentin and Williams (1981, p.292) questionably retained this species in Wilsonidium.  Questionable assignment: Lentin and Williams (1976, p.140).  Age: Paleocene.

Parent: Wilsonidium