Impletosphaeridium baculatum
From dinoflaj3
baculatum (He Chengquan and Li Peng, 1981, p.62, pl.34, figs.21–22) Islam, 1993, p.85. Holotype: He Chengquan and Li Peng, 1981, pl.34, fig.21; Fauconnier and Masure, 2004, pl.48, fig.7. Originally Cleistosphaeridium, subsequently (and now) Impletosphaeridium. Age: late Oligocene.
Parent: Impletosphaeridium