Hystrichosphaeridium baciferum

"baciferum" (Eisenack, 1934, p.66, pl.4, figs.20-21) Eisenack, 1938b, p.189.  Holotype: Eisenack, 1934, pl.4, fig.20, lost according to Eisenack (1962, p.356).  Neotype: Eisenack, 1962, pl.44, fig.3, designated by Eisenack (1962, p.356).  NOW Bacisphaeridium (Appendix A).  Originally Bion (Appendix A), subsequently Hystrichosphaeridium, thirdly Veryhachium (combination not validly published; Appendix A), fourthly (and now) Bacisphaeridium (Appendix A), fifthly Baltisphaeridium (combination not validly published; Appendix A).  Age: Late Ordovician.

Parent: Hystrichosphaeridium