Operculodinium wallii
From dinoflaj3
wallii Matsuoka, 1983b, p.127, pl.7, fig.9; pl.9, figs.1a–b,2,3a–b,4. Holotype: Matsuoka, 1983b, pl.9, figs.1a–b. Head in Head and Wrenn (1992, p.24) considered this species to be a possible taxonomic junior synonym of Operculodinium centrocarpum. Age: late Miocene–early Pleistocene.
Parent: Operculodinium