Hystrichosphaeridium nudatum

"nudatum" Timofeev, 1959, p.53, pl.4, fig.10.  Holotype: Timofeev, 1959, pl.4, fig.10.  NOW Baltisphaeridium (Appendix A).  Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium (Appendix A).  Age: Early Ordovician.

Parent: Hystrichosphaeridium