Ovum hispidum subsp. tubiferum Appendix A

"subsp. tubiferum" (Ehrenberg, 1838, pl.1, fig.16) Downie and Sarjeant, 1965, p.174.  Emendation: Davey and Williams, 1966b, p.56-58.  Holotype: Ehrenberg, 1838, pl.1, fig.16.  Combination not validly published: specific name not validly published, basionym not fully referenced, and combination not intended.  NOW Hystrichosphaeridium tubiferum.  Originally Xanthidium tubiferum (Appendix A), subsequently Hystrichosphaera tubifera (combination not validly published), thirdly (and now) Hystrichosphaeridium tubiferum, fourthly Ovum hispidum subsp. tubiferum (combination not validly published).  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.  Downie and Sarjeant (1965, p.174) attributed this combination to Lohmann (1904); however, the combination was apparently not proposed in that publication.  Age: Late Cretaceous?.Ovum hispidum