Cleistosphaeridium tenuifilum
From dinoflaj2
"tenuifilum" Cookson and Eisenack, 1982, p.40, pl.8, fig.14. Holotype: Cookson and Eisenack, 1982, pl.8, fig.14. NOW Impletosphaeridium?. Originally Cleistosphaeridium, subsequently (and now) Impletosphaeridium?. Age: Paleocene.
Parent: Cleistosphaeridium