Hystrichosphaeridium asperum
From dinoflaj2
"asperum" Maier, 1959, p.319, pl.33, fig.2. Emendation: Sarjeant, 1983, p.113-114, as Polysphaeridium asperum. Holotype: Maier, 1959, pl.33, fig.2. NOW Polysphaeridium. Originally Hystrichosphaeridium, subsequently Polysphaeridium?, thirdly Dapsilidinium, fourthly (and now) Polysphaeridium. Age: Mid Miocene.
Parent: Hystrichosphaeridium
