Hystrichosphaeridium arrectum

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"arrectum" Timofeev, 1959, p.53, pl.4, fig.8.  Holotype: Timofeev, 1959, pl.4, fig.8.  NOW Baltisphaeridium (Appendix A).  Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium (Appendix A).  Age: Early-Mid Ordovician.

Parent: Hystrichosphaeridium