Xanthidium tubiferum var. simplex Appendix A

"var. simplex" White, 1842, p.38, pl.4, fig.10.  Holotype: White, 1842, pl.4, fig.10.  NOW Dapsilidinium.  Originally Xanthidium tubiferum var. simplex, subsequently Xanthidium simplex (Appendix A), thirdly Hystrichosphaeridium simplex, fourthly Polysphaeridium? simplex, fifthly (and now) Dapsilidinium simplex.  Age: Late Cretaceous. Parent: Xanthidium tubiferum