Impletosphaeridium tenuifilum

?tenuifilum (Cookson and Eisenack, 1982, p.40, pl.8, fig.14) Islam, 1993, p.87.  Holotype: Cookson and Eisenack, 1982, pl.8, fig.14.  Originally Cleistosphaeridium, subsequently (and now) Impletosphaeridium?.  Questionable assignment: Islam (1993, p.87).  Age: Paleocene.

Parent: Impletosphaeridium