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Baltisphaeridium tribuliferum

Baltisphaeridium tribuliferum, Sarjeant, 1962

Now Cleistosphaeridium?. Originally Baltisphaeridium, subsequently Cleistosphaeridium, thirdly (and now) Cleistosphaeridium?.

Holotype: Sarjeant, 1962, pl.70, fig.4
Age: Oxfordian
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