Fibrocysta bipolaris
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*bipolaris (Cookson and Eisenack, 1965b, p.135, pl.16, figs.7–8) Stover and Evitt, 1978, p.155. Holotype: Cookson and Eisenack, 1965b, pl.16, fig.8. Originally Cordosphaeridium, subsequently Lanternosphaeridium, thirdly Amphorosphaeridium, fourthly (and now) Fibrocysta. Age: early Eocene.
Parent: Fibrocysta