Baltisphaeridium diploporum Appendix A
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diploporum (Eisenack, 1951, p.190-191, pl.2, fig.6) Downie and Sarjeant, 1965, p.89. Holotype: Eisenack, 1951, pl.2, fig.6. Originally Hystrichosphaeridium, subsequently Micrhystridium (combination not validly published, Appendix A), thirdly (and now) Baltisphaeridium. This combination was not validly published in Downie and Sarjeant (1963, p.90), since these authors did not fully reference the basionym. Age: Ordovician (erratic).
Parent: Baltisphaeridium
