Xanthidium palmatum Appendix A

"palmatum" (White, 1842, p.39-40, pl.4, fig.12) Bronn, 1848, p.1375.  Holotype: White, 1842, pl.4, fig.12.  Originally Xanthidium tubiferum var. palmatum (Appendix A), subsequently Xanthidium palmatum, thirdly Spiniferites palmatus, fourthly Cordosphaeridium palmatum, fifthly Hystrichosphaeridium recurvatum (combination illegitimate), sixthly Hystrichosphaeridium duplum (name illegitimate).  Nomenclatural senior synonym: Xanthidium tubiferum var. recurvatum (as Hystrichosphaeridium recurvatum), which has the same holotype.  Nomenclatural junior synonyms: Xanthidium tubiferum var. palmaforme and Hystrichosphaeridium duplum, both of which have the same holotype as Hystrichosphaeridium palmatum.  This is not an illegitimate combination.  See Hystrichosphaeridium recurvatum for a full discussion.  Age: Senonian.

Parent: Xanthidium_Appendix A