Hystrichosphaeridium echinoides
From dinoflaj2
"echinoides" Maier, 1959, p.318-319, pl.32, figs.5-6. Holotype: Maier, 1959, pl.32, fig.6. Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Cleistosphaeridium. Taxonomic senior synonym: Xanthidium (now Spiniferites) ramosum, according to Sarjeant (1983, p.91-92). Age: mid Oligocene-Mid Miocene.
Parent: Hystrichosphaeridium
