Hystrichosphaeridium hymenoferum
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"hymenoferum" Eisenack, 1938a, p.19, pl.3, figs.2-5. Holotype: Eisenack, 1938a, pl.3, fig.2. NOW Peteinosphaeridium (Appendix A). Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly (and now) Peteinosphaeridium (Appendix A). Age: Ordovician (erratic).
Parent: Hystrichosphaeridium
