Hystrichosphaeridium tshunense
From dinoflaj3
"tshunense" Timofeev, 1962 — caption to pl.11, fig.1. Holotype: Timofeev, 1962 pl.11, fig.1. NOW Baltisphaeridium (Appendix A). Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium (Appendix A). Age: Middle Ordovician.
Parent: Hystrichosphaeridium