Cleistosphaeridium bergmannii
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"bergmannii" Archangelsky, 1969a, p.414–415, pl.2, figs.8,11. Holotype: Archangelsky, 1969a, pl.2, fig.11. NOW Lingulodinium. Originally Cleistosphaeridium, subsequently Operculodinium, thirdly Downiesphaeridium, fourthly (and now) Lingulodinium. Taxonomic junior synonyms: Solisphaeridium filamentosum (Appendix A) and Impletosphaeridium charrieri, both according to Quattrocchio and Sarjeant (2003, p.142). Age: Eocene.
Parent: Cleistosphaeridium