Cleistosphaeridium brevibaculum
From dinoflaj3
"brevibaculum" Song Zhichen in Song Zhichen et al., 1985, p.31, pl.4, fig.10. Holotype: Song Zhichen et al., 1985, pl.4, fig.10. NOW Impletosphaeridium. Originally Cleistosphaeridium, subsequently (and now) Impletosphaeridium. Age: Cenozoic.
Parent: Cleistosphaeridium