Adnatosphaeridium membraniphorum

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?membraniphorum Jan du Chêne and Adediran, 1985, p.10, pl.20, figs.1–6; pl.21, figs.1–10; pl.22, figs.1–4.  Holotype: Jan du Chêne and Adediran, 1985, pl.20, figs.1–3.  Originally Adnatosphaeridium, subsequently (and now) Adnatosphaeridium?.  Questionable assignment: Stancliffe and Sarjeant (1990, p.200).  Age: late Paleocene–early Eocene.

Parent: Adnatosphaeridium