Xanthidium tubiferum var. simplex Appendix A
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"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.Xanthidium tubiferum
