Micrhystridium diploporum Appendix A

"diploporum" (Eisenack, 1951, p.190–191, pl.2, fig.6) Downie and Sarjeant, 1963, p.90.  Holotype: Eisenack, 1951, pl.2, fig.6.  Name not validly published: basionym not fully referenced.  NOW Baltisphaeridium (Appendix A).  Originally Hystrichosphaeridium, subsequently Micrhystridium, thirdly (and now) Baltisphaeridium (Appendix A).  Age: Ordovician (erratic).

Parent: Micrhystridium_Appendix A