Difference between revisions of "Baltisphaeridium claviferum Appendix A"

<I><B>claviferum</B></I> ([[Wilkinson, 1849]], p.89-92, pl.13, fig.1) [[Downie and Sarjeant, 1965]], p.88.&nbsp; Holotype: [[Wilkinson, 1849]], pl.13, fig.1.&nbsp; Originally <I>[[Xanthidium claviferum Appendix A|Xanthidium]]</I> (Appendix A), subsequently <I>[[Hystrichosphaeridium claviferum|Hystrichosphaeridium]]</I>, thirdly (and now) <I>Baltisphaeridium</I>.&nbsp; According to [[Wilkinson, 1849|Wilkinson (1849]], p.89), "This species was originally named <I>Xanthidium tubiferum dilatatum</I>, but as the duplex trivial name is contrary to the rules of nomenclature, it has been thought advisable to alter it to <I>[[Xanthidium claviferum Appendix A|Xanthidium claviferum]]</I> ...".&nbsp; Wilkinson's contention is not necessarily the case since, as <I>[[Xanthidium tubiferum var. dilatatum Appendix A|Xanthidium tubiferum]]</I> var. <I>[[Xanthidium tubiferum var. dilatatum Appendix A|dilatatum]]</I>, the "earlier" name may have been validated.&nbsp; However, Wilkinson gave no further information regarding the source of the name "<I>Xanthidium tubiferum dilatatum</I>".&nbsp; This combination was not validly published in [[Downie and Sarjeant, 1963|Downie and Sarjeant (1963]], p.91), since these authors did not fully reference the basionym.&nbsp; Age: Late Cretaceous.