Micrhystridium diploporum Appendix A

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"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