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