Cleistosphaeridium insolitum

"?insolitum" (Eaton, 1976, p.308, pl.21, figs.5,8; text-fig.25B) Stover and Evitt, 1978, p.31.  Holotype: Eaton, 1976, pl.21, fig.5; Fauconnier and Masure, 2004, pl.49, figs.5–6.  NOW Impletosphaeridium.  Originally (and now) Impletosphaeridium, subsequently Cleistosphaeridium?.  Questionable assignment: Stover and Evitt (1978, p.31).  Age: early-middle Eocene (see Aubry, 1986).

Parent: Cleistosphaeridium