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Appendix A

Baltisphaeridium hirsutoides var. hamatum

"Baltisphaeridium hirsutoides var. hamatum" (Downie, 1958, p.335, pl.16, fig.1; text-figs.2j-k) Downie and Sarjeant, 1965, p.91.

TYPE: Holotype: Downie, 1958, pl.16, fig.1.

HISTORY: NOW: Baltisphaeridium hamatum (Appendix A). Originally Hystrichosphaeridium hirsutoides var. hamatum, subsequently Baltisphaeridium hirsutoides var. hamatum, thirdly Micrhystridium hamatum (Appendix A), fourthly Acanthodiacrodium hamatum (Appendix A), fifthly (and now) Baltisphaeridium hamatum (an acritarch species, Appendix A).

AGE: Early Ordovician.


Infraspecific taxa:


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