Polysphaeridium simplex

"?simplex" (White, 1842, p.38, pl.4, fig.3, fig.10) Davey and Williams, 1969, p.7.  Holotype: White, 1842, pl.4, fig.10.  NOW Dapsilidinium simplex.  Originally Xanthidium tubiferum var. simplex (Appendix A), subsequently Xanthidium simplex (Appendix A), thirdly Hystrichosphaeridium simplex, fourthly Polysphaeridium? simplex, fifthly (and now) Dapsilidinium simplex.  Questionable assignment: Davey and Williams (1969, p.7).  This combination, as a questionable assignment, was not validly published in Davey and Williams (1966b, p.95), since these authors did not fully reference the basionym.  Age: Late Cretaceous.

Parent: Polysphaeridium