Impletosphaeridium insolitum

insolitum Eaton, 1976, p.308, pl.21, figs.5,8; text-fig.25B.  Holotype: Eaton, 1976, pl.21, fig.5; Bujak et al., 1980, pl.5, fig.5; Fauconnier and Masure, 2004, pl.49, figs.5-6.  Originally (and now) Impletosphaeridium, subsequently Cleistosphaeridium?.  This species was retained in Impletosphaeridium by Islam (1993, p.86).  Age: Early-Mid Eocene (see Aubry, 1986).

Parent: Impletosphaeridium