Hystrichosphaeridium fluctuans

"fluctuans" (Eisenack, 1938c, p.230-231, pl.16, figs.1--3) Pastiels, 1948, p.40.  Holotype: Eisenack, 1938c, pl.16, fig.3.  NOW Baltisphaeridium (Appendix A).  Originally Bion (Appendix A), subsequently Hystrichosphaeridium, thirdly Polysphaeridium? (combination not validly published), fourthly (and now) Baltisphaeridium (Appendix A).  Age: Silurian.

Parent: Hystrichosphaeridium