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Appendix A

Baltisphaeridium spinosum

"Baltisphaeridium spinosum" (White, 1842, p.37, pl.4, fig.6) Downie and Sarjeant, 1965, p.96.

TYPE: Holotype: White, 1842, pl.4, fig.6.

HISTORY: NOW: Exochosphaeridium?. Originally Xanthidium (Appendix A), subsequently Hystrichosphaeridium, thirdly Baltisphaeridium, fourthly Cordosphaeridium (combination not validly published), fifthly Exochosphaeridium, sixthly (and now) Exochosphaeridium?.

JUNIOR HOMONYM: Baltisphaeridium spinosum Rasul, 1979, an acritarch species.

COMMENTS: This combination was not validly published in Downie and Sarjeant (1963, p.92), since these authors did not fully reference the basionym.

AGE: Late Cretaceous.


Infraspecific taxa:


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