Xanthidium tubiferum var. spiculatum Appendix A
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"var. spiculatum" White, 1844, p.87, pl.9, fig.4. Holotype: White, 1844, pl.9, fig.4. NOW Baltisphaeridium spiculatum (Appendix A). Originally Xanthidium tubiferum var. spiculatum, subsequently Hystrichosphaeridium spiculatum, thirdly (and now) Baltisphaeridium spiculatum (Appendix A). Age: Late Cretaceous. Parent: Xanthidium tubiferum
