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