Hystrichosphaeridium quadriradiatum
From dinoflaj3
"quadriradiatum" Timofeev, 1959, p.57; pl.4, fig.25. Holotype: Timofeev, 1959, pl.4, fig.25. NOW Baltisphaeridium (Appendix A). Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium (Appendix A). Age: Early Ordovician.
Parent: Hystrichosphaeridium