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Hystrichosphaeridium palmatum*
Hystrichosphaeridium palmatum (White, 1842) Downie and Sarjeant 1965
Combination illegitimate. Jr. homonyrn of Hystrichosphaeridium palmatum Deflandre and Courteville, 1939.
Now Hystrichosphaeridium recurvatum. Originally Xanthidium tubiferum var. palmatum, subsequently Xanthidium palmatum, thirdly Spiniferites palmatus, fourthly Cordosphaeridium palmatum, fifthly Hystrichosphaeridium palmatum (combination illegitimate), sixthly (and now) Hystrichosphaeridium recurvatum. See also Hystrichosphaeridium duplum (name illegitimate).
Stover and Evitt, 1978, stated that their citation recognizes Sarjeant"s first use of palmatum in Hystrichosphaeridium; however, using a generic and specific name together does not constitute a new combination. The valid combination was effected by Downie and Sarjeant, 1965, under Hystrichosphaeridium recurvatum, when they cited the correct page, plate and figure number, as well as three choices of names for the species. Nomenclatural synonym of Xanthidium tubiferum var. palmaforme White 1842 and Xanthidium tubiferum var. recurvatum 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
Combination illegitimate. Jr. homonyrn of Hystrichosphaeridium palmatum Deflandre and Courteville, 1939.
Now Hystrichosphaeridium recurvatum. Originally Xanthidium tubiferum var. palmatum, subsequently Xanthidium palmatum, thirdly Spiniferites palmatus, fourthly Cordosphaeridium palmatum, fifthly Hystrichosphaeridium palmatum (combination illegitimate), sixthly (and now) Hystrichosphaeridium recurvatum. See also Hystrichosphaeridium duplum (name illegitimate).
Stover and Evitt, 1978, stated that their citation recognizes Sarjeant"s first use of palmatum in Hystrichosphaeridium; however, using a generic and specific name together does not constitute a new combination. The valid combination was effected by Downie and Sarjeant, 1965, under Hystrichosphaeridium recurvatum, when they cited the correct page, plate and figure number, as well as three choices of names for the species. Nomenclatural synonym of Xanthidium tubiferum var. palmaforme White 1842 and Xanthidium tubiferum var. recurvatum 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