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Appendix A

Baltisphaeridium tribuliferum

"Baltisphaeridium tribuliferum" Sarjeant, 1962a, p.487, pl.70, fig.4; text-figs.6c,7.

TYPE: Holotype: Sarjeant, 1962a, pl.70, fig.4.

HISTORY: NOW: Impletosphaeridium. Originally Baltisphaeridium, subsequently Cleistosphaeridium, thirdly Cleistosphaeridium?, fourthly (and now) Impletosphaeridium.

AGE: Oxfordian.


Infraspecific taxa:


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