Hystrichosphaeridium atavum
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"atavum" Naumova, 1968, p.38, pl.2, fig.11. Holotype: Naumova, 1968, pl.2, fig.11. NOW Baltisphaeridium (Appendix A). Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium (Appendix A). Age: Cambrian.
Parent: Hystrichosphaeridium