Cleistosphaeridium bergmannii

"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