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Hystrichosphaeridium microspinosum

"Hystrichosphaeridium microspinosum" Eisenack, 1954a, p.209-210, pl.1, fig.8.

TYPE: Holotype: Eisenack, 1954a, pl.1, fig.8.

HISTORY: NOW: Baltisphaeridium (Appendix A). Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium (Appendix A), thirdly Lophosphaeridium (Appendix A), fourthly Visbysphaera (Appendix A), fifthly Buedingiisphaeridium (combination not validly published; Appendix A).

SYNONYM(S): Taxonomic junior synonym: Baltisphaeridium listeri Kiryanov, 1978, an acritarch species, according to Le Hérissé (1989, p.210).

AGE: Silurian (Late Llandovery).


Infraspecific taxa:


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