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Hystrichosphaeridium duplum
Hystrichosphaeridium duplum Lentin and Williams, 1989, nom. subst. pro Hystrichosphaeridium palmatum (White, 1842) Downie and Sarjeant, 1965, non Hystrichosphaeridium palmatum Deflandre and Courteville, 1939
Name illegitimate. Nomenclatural jr. synonym of Hystrichosphaeridium recurvatum (White, 1842) Lejeune-Carpentier, 1940.
Originally Xanthidium tubiferum var. palmatum, subsequently Xanthidium palmatum, thirdly Spiniferites palmatus, fourthly Cordosphaeridium palmatum, fifthly Hystrichosphaeridium palmatum (combination illegitimate), sixthly Hystrichosphaeridium duplum (name illegitimate), seventhly (and now) Hystrichosphaeridium recurvatum.
Nomenclatural synonym of Xanthidium tubiferum var. recurvatum White, 1842 and Xanthidium tubiferum var. palmaforme White, 1842, which have the same holotype.
Bronn, 1848, Sarjeant, 1964, and Stover and Evitt, 1978, regarded Xanthidium palmatum as the sr. synonym. However, when Downie and Sarjeant, 1965, transferred this species to Hystrichosphaeridium, they created a jr. homonym of Hystrichosphaeridium palmatum Deflandre and Courteville, 1939. Accordingly, Lentin and Williams, 1989, proposed the name Hystrichosphaeridium duplum as a nom. subst. for Hystrichosphaeridium palmatum (White, 1842) Downie and Sarjeant, 1965. By doing this Lentin and Williams, 1989, created a nomenclatural jr, synonym of Xanthidium tubiferum var. recurvatum White, 1842, which has priority.
Holotype: White, 1842 pl.4, fig.12
Age: Senonian
Name illegitimate. Nomenclatural jr. synonym of Hystrichosphaeridium recurvatum (White, 1842) Lejeune-Carpentier, 1940.
Originally Xanthidium tubiferum var. palmatum, subsequently Xanthidium palmatum, thirdly Spiniferites palmatus, fourthly Cordosphaeridium palmatum, fifthly Hystrichosphaeridium palmatum (combination illegitimate), sixthly Hystrichosphaeridium duplum (name illegitimate), seventhly (and now) Hystrichosphaeridium recurvatum.
Nomenclatural synonym of Xanthidium tubiferum var. recurvatum White, 1842 and Xanthidium tubiferum var. palmaforme White, 1842, which have the same holotype.
Bronn, 1848, Sarjeant, 1964, and Stover and Evitt, 1978, regarded Xanthidium palmatum as the sr. synonym. However, when Downie and Sarjeant, 1965, transferred this species to Hystrichosphaeridium, they created a jr. homonym of Hystrichosphaeridium palmatum Deflandre and Courteville, 1939. Accordingly, Lentin and Williams, 1989, proposed the name Hystrichosphaeridium duplum as a nom. subst. for Hystrichosphaeridium palmatum (White, 1842) Downie and Sarjeant, 1965. By doing this Lentin and Williams, 1989, created a nomenclatural jr, synonym of Xanthidium tubiferum var. recurvatum White, 1842, which has priority.
Holotype: White, 1842 pl.4, fig.12
Age: Senonian