Difference between revisions of "Hystrichosphaeridium recurvatum"

<I><B>recurvatum</B></I> ([[White, 1842]], p.39, pl.4, fig.12) [[Lejeune-Carpentier, 1940]], p.B221-B222.&nbsp; Holotype: [[White, 1842]], pl.4, fig.12.&nbsp; Originally <I>[[Xanthidium tubiferum var. recurvatum Appendix A|Xanthidium tubiferum]]</I> var. <I>[[Xanthidium tubiferum var. recurvatum Appendix A|recurvatum]]</I> (Appendix A), subsequently (and now) <I>Hystrichosphaeridium recurvatum</I>.&nbsp; Nomenclatural junior synonyms: <I>[[Xanthidium tubiferum var. palmatum Appendix A|Xanthidium tubiferum]]</I> var. <I>[[Xanthidium tubiferum var. palmatum Appendix A|palmatum]]</I> [subsequently <I>Hystrichosphaeridium palmatum</I> (White), an illegitimate name], <I>[[Xanthidium tubiferum var. palmaforme Appendix A|Xanthidium tubiferum]]</I> var. <I>[[Xanthidium tubiferum var. palmaforme Appendix A|palmaforme]]</I> and <I>[[Hystrichosphaeridium duplum]]</I>, since they all have the same holotype as <I>Hystrichosphaeridium recurvatum</I>.&nbsp; [[White, 1842|White (1842]], p.39) named "The twelfth ... species of the genus Xanthidium ... the <I>Tubiferum recurvatum</I> or <I>palmaforme</I> - the curved or palm-formed Tubiferum", thus presenting two epithets in his text.&nbsp; To compound matters, the single illustration was labelled "<I>X. tubiferum palmatum</I>".&nbsp; Since prior to 1953 alternative names were allowed under the I.C.B.N., and since [[White, 1842|White (1842]]) provided a description and illustration, the taxon was validly published.&nbsp; The correct name would be that chosen by the first subsequent author to make such a choice, and this was [[Bronn, 1848|Bronn (1848]], p.1375), who used the name <I>[[Xanthidium palmatum Appendix A|Xanthidium palmatum]]</I>, at species rank.&nbsp; When [[Downie and Sarjeant, 1965|Downie and Sarjeant (1965]], p.121) transferred <I>[[Xanthidium palmatum Appendix A|Xanthidium palmatum]]</I> to <I>Hystrichosphaeridium</I>, they created an illegitimate combination - a junior homonym of <I>Hystrichosphaeridium palmatum</I> Deflandre and Courteville.&nbsp; Hence, since <I>[[Xanthidium tubiferum var. recurvatum Appendix A|Xanthidium tubiferum]]</I> var. <I>[[Xanthidium tubiferum var. recurvatum Appendix A|recurvatum]]</I> had been raised to specific rank, as <I>Hystrichosphaeridium recurvatum</I>, by [[Lejeune-Carpentier, 1940|Lejeune-Carpentier (1940]]), "<I>recurvatum</I>" becomes the correct epithet as long as the epithet "<I>palmatum</I>" remains unavailable.&nbsp; Age: Senonian.

<I><B>recurvatum</B></I> ([[White, 1842]], p.39, pl.4, fig.12) [[Lejeune-Carpentier, 1940]], p.B221-B222.&nbsp; Holotype: [[White, 1842]], pl.4, fig.12.&nbsp; Originally <I>[[Xanthidium tubiferum var. recurvatum Appendix A|Xanthidium tubiferum]]</I> var. <I>[[Xanthidium tubiferum var. recurvatum Appendix A|recurvatum]]</I> (Appendix A), subsequently (and now) <I>Hystrichosphaeridium recurvatum</I>.&nbsp; Nomenclatural junior synonyms: <I>[[Xanthidium tubiferum var. palmatum Appendix A|Xanthidium tubiferum]]</I> var. <I>[[Xanthidium tubiferum var. palmatum Appendix A|palmatum]]</I> [subsequently <I>Hystrichosphaeridium palmatum</I> (White), an illegitimate name], <I>[[Xanthidium tubiferum var. palmaforme Appendix A|Xanthidium tubiferum]]</I> var. <I>[[Xanthidium tubiferum var. palmaforme Appendix A|palmaforme]]</I> and <I>[[Hystrichosphaeridium duplum]]</I>, since they all have the same holotype as <I>Hystrichosphaeridium recurvatum</I>.&nbsp; [[White, 1842|White (1842]], p.39) named "The twelfth ... species of the genus Xanthidium ... the <I>Tubiferum recurvatum</I> or <I>palmaforme</I> - the curved or palm-formed Tubiferum", thus presenting two epithets in his text.&nbsp; To compound matters, the single illustration was labelled "<I>X. tubiferum palmatum</I>".&nbsp; Since prior to 1953 alternative names were allowed under the I.C.B.N., and since [[White, 1842|White (1842]]) provided a description and illustration, the taxon was validly published.&nbsp; The correct name would be that chosen by the first subsequent author to make such a choice, and this was [[Bronn, 1848|Bronn (1848]], p.1375), who used the name <I>[[Xanthidium palmatum Appendix A|Xanthidium palmatum]]</I>, at species rank.&nbsp; When [[Downie and Sarjeant, 1965|Downie and Sarjeant (1965]], p.121) transferred <I>[[Xanthidium palmatum Appendix A|Xanthidium palmatum]]</I> to <I>Hystrichosphaeridium</I>, they created an illegitimate combination - a junior homonym of <I>Hystrichosphaeridium palmatum</I> Deflandre and Courteville.&nbsp; Hence, since <I>[[Xanthidium tubiferum var. recurvatum Appendix A|Xanthidium tubiferum]]</I> var. <I>[[Xanthidium tubiferum var. recurvatum Appendix A|recurvatum]]</I> had been raised to specific rank, as <I>Hystrichosphaeridium recurvatum</I>, by [[Lejeune-Carpentier, 1940|Lejeune-Carpentier (1940]]), "<I>recurvatum</I>" becomes the correct epithet as long as the epithet "<I>palmatum</I>" remains unavailable.&nbsp; Age: Senonian.

[[Category:Taxon]]

[[Category:Taxon]]

[[Category:Species|recurvatum Hystrichosphaeridium]]

[[Category:Species|recurvatum Hystrichosphaeridium]]