Hystrichosphaeridium spiculatum (White, 1844) Deflandre, 1937

Now Baltisphaeridium spiculatum. Originally Xanthidium tubiferum var. spiculatum, subsequently Hystrichosphaeridium spiculatum, thirdly (and now) Baltisphaeridium spiculatum.
Holotype: White, 1844, pl.9, fig.4
Age: Late Cretaceous