Impletosphaeridium giganteum

"giganteum" (Caro, 1973, p.360–361, pl.2, fig.12) Islam, 1993, p.86.  Holotype: Caro, 1973, pl.2, fig.12; Fauconnier and Masure, 2004, pl.49, figs.13–14.  NOW Exochosphaeridium.  Originally Polysphaeridium, subsequently Cleistosphaeridium, thirdly Impletosphaeridium, fourthly (and now) Exochosphaeridium.  Age: early Eocene.

Parent: Impletosphaeridium