Impletosphaeridium sphericum

?sphericum (Horowitz, 1975, p.24, pl.1, fig.5) Islam, 1993, p.87.  Holotype: Horowitz, 1975, pl.1, fig.5.  Originally Cleistosphaeridium, subsequently (and now) Impletosphaeridium.  Questionable assignment: Islam (1993, p.87).  Age: Late Jurassic.

Parent: Impletosphaeridium