Cordosphaeridium bipolare
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"bipolare" Cookson and Eisenack, 1965b, p.135, pl.16, figs.7-8. Holotype: Cookson and Eisenack, 1965b, pl.16, fig.8. NOW Fibrocysta. Originally Cordosphaeridium, subsequently Lanternosphaeridium, thirdly Amphorosphaeridium, fourthly (and now) Fibrocysta. Age: Early Eocene.
Parent: Cordosphaeridium