Hystrichosphaeridium palmatum White 1842
"palmatum" (White, 1842, p.39-40, pl.4, fig.12) Downie and Sarjeant, 1965, p.121. Holotype: White, 1842, pl.4, fig.12. Combination illegitimate - senior homonym: Hystrichosphaeridium palmatum Deflandre and Courteville, 1939. Nomenclatural senior synonym: Xanthidium tubiferum var. recurvatum (as Hystrichosphaeridium recurvatum), which has the same holotype. Substitute name: Hystrichosphaeridium duplum. Originally Xanthidium tubiferum var. palmatum (Appendix A), subsequently Xanthidium palmatum (Appendix A), thirdly Spiniferites palmatus, fourthly Cordosphaeridium palmatum, fifthly Hystrichosphaeridium palmatum (combination illegitimate), sixthly Hystrichosphaeridium duplum (name illegitimate). Nomenclatural junior synonyms: Xanthidium tubiferum var. palmaforme and Hystrichosphaeridium duplum, both of which have the same holotype as Hystrichosphaeridium palmatum. See Hystrichosphaeridium recurvatum for a full discussion. Age: Senonian.
Parent: Hystrichosphaeridium
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