Xanthidium simplex White, 1842

Now Dapsilidinium. Originally Xanthidium tubiferum var. simplex (a desmid varietas), subsequently Xanthidium simplex, thirdly Hystrichosphaeridium simplex, fourthly Polysphaeridium? simplex, fifthly (and now) Dapsilidinium simplex.
Holotype: White, 1842, pl.4, fig.10
Age: Late Cretaceous