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Impletosphaeridium varispinosum

Impletosphaeridium varispinosum (Sarjeant, 1959, p.338-340, pl.13, fig.7; text-fig.6) Islam, 1993, p.87.

TYPE: Holotype: Sarjeant, 1959, pl.13, fig.7; text-fig.6.

HISTORY: Originally Baltisphaeridium (Appendix A), subsequently Tenua Eisenack, thirdly Sentusidinium, fourthly Sentusidinium?, fifthly Cleistosphaeridium, sixthly (and now) Impletosphaeridium.

AGE: Early Callovian.


Infraspecific taxa:


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