Fibrocysta essentialis
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essentialis (de Coninck, 1969, p.38, pl.11, figs.7–8) Brinkhuis and Zachariasse, 1988, p.187. Holotype: de Coninck, 1969, pl.11, figs.7–8. Originally Lanternosphaeridium, subsequently Kenleyia?, thirdly (and now) Fibrocysta. Age: early Eocene.
Parent: Fibrocysta