Operculodinium alsium
From dinoflaj3
alsium Matsuoka and Bujak, 1988, p.64–65, pl.8, figs.7,8a–b,9. Holotype: Matsuoka and Bujak, 1988, pl.8, figs.8a–b; Head, 1994b, pl.8, figs.6–9. Age: late Miocene.
Parent: Operculodinium