Hystrichosphaeridium borracherosum
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"borracherosum" (Cramer, 1964, p.289, pl.1, fig.11; text-fig.16, no.6) Andreeva, 1973, p.192. Holotype: Cramer, 1964, pl.1, fig.11. Combination not validly published: basionym not fully referenced. NOW Petaloferidium (Appendix A). Originally Baltisphaeridium (Appendix A), subsequently Multiplicisphaeridium (Appendix A), thirdly Hystrichosphaeridium (combination not validly published), fourthly (and now) Petaloferidium (Appendix A). Age: Silurian (Ludlow).
Parent: Hystrichosphaeridium