Cleistosphaeridium araneosum
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"araneosum" Brideaux, 1977, p.22–23, pl.9, figs.1–3. Holotype: Brideaux, 1977, pl.9, figs.1–2. NOW Circulodinium?. Originally Cleistosphaeridium, subsequently Heterosphaeridium, thirdly (and now) Circulodinium?. Age: Aptian–Albian.
Parent: Cleistosphaeridium