Polysphaeridium williereae
From dinoflaj3
"williereae" Boltenhagen, 1977, p.42–43, pl.3, figs.3a–b,4–6. Holotype: Boltenhagen, 1977, pl.3, figs.3a–b. NOW Apectodinium?. Originally Polysphaeridium, subsequently (and now) Apectodinium?. Age: Paleocene.
Parent: Polysphaeridium