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Appendix A

Baltisphaeridium sexradiatum

"Baltisphaeridium sexradiatum" (Timofeev, 1959, p.53, pl.4, fig.7) Downie and Sarjeant, 1965, p.96.

TYPE: Holotype: Timofeev, 1959, pl.4, fig.7.

HISTORY: Originally Hystrichosphaeridium, subsequently Baltisphaeridium.

SYNONYM(S): Taxonomic senior synonym: Hystrichosphaeridium (now Polygonium) polygonale, according to Eisenack (1965c, p.261).

COMMENTS: This combination was not validly published in Downie and Sarjeant (1963, p.90), since these authors did not fully reference the basionym.

AGE: Early Ordovician.


Infraspecific taxa:


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