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Appendix A

Baltisphaeridium arrectum

Baltisphaeridium arrectum (Timofeev, 1959, p.53, pl.4, fig.8) Downie and Sarjeant, 1965, p.87.

TYPE: Holotype: Timofeev, 1959, pl.4, fig.8.

HISTORY: Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium.

COMMENTS: This combination was not validly published in Downie and Sarjeant (1963, p.89), since these authors did not fully reference the basionym.

AGE: Early-Mid Ordovician.


Infraspecific taxa:


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