Hystrichosphaeridium atavum
From dinoflaj2
"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
