Xanthidium malleoferum Appendix A

"malleoferum" White, 1842, p.37, pl.4, div.3, fig.7.  Holotype: White, 1842, pl.4, div.3, fig.7; Sarjeant, 1991, fig.4.6.  NOW Achomosphaera?.  Originally Xanthidium, subsequently Baltisphaeridium (Appendix A), thirdly (and now ) Achomosphaera?, fourthly Hystrichosphaeridium (combination not validly published).  Age: Late Cretaceous.

Parent: Xanthidium_Appendix A