Cordosphaeridium microtriainum var. nanus

"var. nanus" Rozen, 1965, p.311, pl.2, figs.7–8; text-fig.21.  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.  N.I.A.  Age: late Eocene.

Parent: Cordosphaeridium microtriainum