Xanthidium spinosum Appendix A
From dinoflaj2
"spinosum" White, 1842, p.37, pl.4, fig.6. Holotype: White, 1842, pl.4, fig.6. NOW Exochosphaeridium?. Originally Xanthidium, subsequently Hystrichosphaeridium, thirdly Baltisphaeridium (Appendix A), fourthly Cordosphaeridium (combination not validly published), fifthly Exochosphaeridium, sixthly (and now) Exochosphaeridium?. Age: Late Cretaceous.
Parent: Xanthidium
