Hystrichosphaeridium lewisii
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"lewisii" Deunff, 1954a, p.240, fig.3. Holotype: Deunff, 1954a, fig.3. NOW Gorgonisphaeridium? (Appendix A). Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Ammonidium (combination not validly published; Appendix A), fourthly Multiplicisphaeridium (Appendix A), fifthly (and now) Gorgonisphaeridium? (Appendix A). Age: Middle Devonian.
Parent: Hystrichosphaeridium