Cordosphaeridium spinosum
From dinoflaj3
"spinosum" (White, 1842, p.37, pl.4, fig.6) de Coninck, 1965, p.31. Holotype: White, 1842, pl.4, fig.6; lost according to Sarjeant (1966b, p.141). Combination not validly published: basionym not fully referenced. NOW Exochosphaeridium?. Originally Xanthidium (Appendix A), subsequently Hystrichosphaeridium, thirdly Baltisphaeridium (Appendix A), fourthly Cordosphaeridium (combination not validly published), fifthly Exochosphaeridium, sixthly (and now) Exochosphaeridium?. Age: Late Cretaceous.
Parent: Cordosphaeridium
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