Xanthidium tubiferum Appendix A
"tubiferum" Ehrenberg, 1837b, pl.1, fig.16. Emendation: Davey and Williams, 1966b, p.56–58, as Hystrichosphaeridium tubiferum. Holotype: Ehrenberg, 1837b, pl.1, fig.16. NOW Hystrichosphaeridium tubiferum. Originally Xanthidium tubiferum, subsequently Hystrichosphaera tubifera (combination not validly published), thirdly (and now) Hystrichosphaeridium tubiferum, fourthly Ovum hispidum subsp. tubiferum (combination not validly published; Appendix A). Taxonomic junior synonym: Xanthidium (as Hystrichokolpoma) bulbosum, according to Stover and Evitt (1978, p.55) — however, Lentin and Williams (1989, p.134) retained Xanthidium (as Hystrichokolpoma) bulbosum. The validity/authorship of this name may need to be reconsidered as it appears that Ehrenberg (1837b) did not provide a description. Age: Late Cretaceous?.
Parent: Xanthidium_Appendix A
Infrataxon List:
"Xanthidium tubiferum var. dilatatum Appendix A"
"Xanthidium tubiferum var. palmaforme Appendix A"
"Xanthidium tubiferum var. palmatum Appendix A"
"Xanthidium tubiferum var. recurvatum Appendix A"
"Xanthidium tubiferum var. simplex Appendix A"
"Xanthidium tubiferum var. spiculatum Appendix A"