Hystrichosphaeridium albertense Pocock, 1962

Now Oligosphaeridium. Originally Hystrichosphaeridium, subsequently (and now) Oligosphaeridium.
Taxonomic junior synonyms: Hystrichosphaeridium (as Oligosphaeridium) irregulare, according to Jansonius (1986, p.213); Hystrichosphaeridium (as Oligosphaeridium?) coelenteratum, Hystrichosphaeridium (as Oligosphaeridium?) dispare and Hystrichosphaeridium (as Oligosphaeridium) reniforme, by implication in Stover and Evitt (1978, p.68-69), who considered these species to be taxonomic junior synonyms of Hystrichosphaeridium (as Oligosphaeridium) irregulare, which is now a taxonomic junior synonym of Hystrichosphaeridium (now Oligosphaeridium) albertense.

Holotype: Pocock, 1962, pl.15, fig.226; Brideaux, 1977, pl.11, figs.3-4; Jansonius, 1986, pl.4, figs.4-5
Age: Barremian