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Appendix A

Baltisphaeridium diploporum

Baltisphaeridium diploporum (Eisenack, 1951, p.190-191, pl.2, fig.6) Downie and Sarjeant, 1965, p.89.

TYPE: Holotype: Eisenack, 1951, pl.2, fig.6.

HISTORY: Originally Hystrichosphaeridium, subsequently Micrhystridium (combination not validly published, Appendix A), thirdly (and now) Baltisphaeridium.

COMMENTS: 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).


Infraspecific taxa:


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