Hystrichosphaeridium diploporum
From dinoflaj2
"diploporum" Eisenack, 1951, p.190-191, pl.2, fig.6. Holotype: Eisenack, 1951, pl.2, fig.6. NOW Baltisphaeridium (Appendix A). Originally Hystrichosphaeridium, subsequently Micrhystridium (name not validly published; Appendix A), thirdly (and now) Baltisphaeridium (Appendix A). Age: Ordovician (erratic).
Parent: Hystrichosphaeridium
