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Appendix A

Visbysphaera pirifera

Visbysphaera pirifera (Eisenack, 1954a, p.206-207, pl.1, figs.1a-b; text-fig.1) Kiryanov, 1978, p.89-90.

TYPE: Holotype: Eisenack, 1954a, pl.1, figs.1a-b.

HISTORY: Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Multiplicisphaeridium (Appendix A), fourthly (and now) Visbysphaera.

SYNONYM(S): Taxonomic junior synonym: Baltisphaeridium hermosum Cramer and Diez, 1968 (name not validly published), an acritarch species, according to Cramer (1970, p.148); Baltisphaeridium (now Visbysphaera) dilatispinosum Downie, 1963, an acritarch species, according to Eisenack (1965c, p.263) - however, Fensome et al. (1990, p.530) retained Visbysphaera dilatispinosa.

COMMENTS: This combination was not validly published in T.R. Lister (1970, p.98) since that author did not clearly use the name.

AGE: Silurian (Late Llandovery).


Infraspecific taxa:


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