Cordosphaeridium microtriainum var. nanum Rozen, 1965

Now Cleistosphaeridium? nanum. Originally Cordosphaeridium microtriainum var. nanum, subsequently Cordosphaeridium microtriainum ssp. nanum, thirdly (and now) Cleistosphaeridium? nanum.
Holotype: Rozen, 1965, pl.2, fig.7-8
Age: Late Eocene