Cleistosphaeridium nanus

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"?nanus" (Rozen, 1965, p.311, pl.2, figs.7–8; text-fig.21) Sarjeant, 1981, p.122.  Holotype: Rozen, 1965, pl.2, figs.7–8.  NOW Impletosphaeridium nanus.  Originally Cordosphaeridium microtriainum var. nanus, subsequently Cordosphaeridium microtriainum subsp. nanus, thirdly Cleistosphaeridium? nanus, fourthly (and now) Impletosphaeridium nanus.  Questionable assignment: Sarjeant (1981, p.122).  N.I.A.  Age: late Eocene.

Parent: Cleistosphaeridium