Xanthidium tubiferum var. recurvatum Appendix A
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"var. recurvatum" White, 1842, p.39, pl.4, fig.12. Holotype: White, 1842, pl.4, fig.12. NOW Hystrichosphaeridium recurvatum. Originally Xanthidium tubiferum var. recurvatum, subsequently (and now) Hystrichosphaeridium recurvatum. Nomenclatural junior synonyms: Xanthidium tubiferum var. palmaforme, Xanthidium tubiferum var. palmatum and Hystrichosphaeridium duplum, all of which have the same holotype as Xanthidium tubiferum var. recurvatum. Age: Senonian. Parent: Xanthidium tubiferum
