Hystrichosphaeridium microfurcatum
From dinoflaj3
"microfurcatum" Deunff, 1957, p.6, fig.2 — p.13; fig.3 — p.14. Holotype: Deunff, 1957, fig.2 — p.13. NOW Ammonidium (Appendix A). Originally Hystrichosphaeridium, subsequently Veryhachium (combination not validly published, Appendix A), thirdly Baltisphaeridium (Appendix A), fourthly (and now) Ammonidium (Appendix A). Age: Middle Devonian.
Parent: Hystrichosphaeridium