Hystrichosphaeridium claviferum

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"claviferum" (Wilkinson, 1849, p.89-92, pl.13, fig.1) Deflandre, 1946a, card 887.  Holotype: Wilkinson, 1849, pl.13, fig.1.  NOW Baltisphaeridium (Appendix A).  Originally Xanthidium (Appendix A), subsequently Hystrichosphaeridium, thirdly (and now) Baltisphaeridium (Appendix A).  Age: Late Cretaceous.

Parent: Hystrichosphaeridium