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Appendix A

Baltisphaeridium malleoferum

"Baltisphaeridium malleoferum" (White, 1842, p.37, pl.4, div.3, fig.7) Downie and Sarjeant, 1965, p.92.

TYPE: Holotype: White, 1842, pl.4, div.3, fig.7; Sarjeant, 1991, fig.4.6.

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

COMMENTS: This combination was not validly published in Downie and Sarjeant (1963, p.91), since these authors did not fully reference the basionym.

AGE: Late Cretaceous.


Infraspecific taxa:


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