Impletosphaeridium primordiale
From dinoflaj2
"?primordiale" Wetzel, 1967b, p.41-42, pl.3, fig.18. Holotype: Wetzel, 1967b, pl.3, fig.18. Taxonomic senior synonym: Hystrichosphaeridium (now Polygonium - Appendix A) polygonale, according to Eisenack et al. (1973, p.497-498). Questionable assignment: Wetzel (1967b, p.41). Age: Ordovician.
Parent: Impletosphaeridium
