Hystrichosphaera borussica
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"borussica" Eisenack, 1954b, p.62, pl.9, figs.5a–b,6–7. Holotype: Eisenack, 1954b, pl.9, fig.5a–b. NOW Rottnestia. Originally Hystrichosphaera, subsequently (and now) Rottnestia, thirdly Triblastula, fourthly Hystrichosphaeropsis (combination not validly published). Taxonomic junior synonym: Hystrichosphaeropsis jubata (name not validly published), according to May (1980, p.24). Age: early Oligocene.
Parent: Hystrichosphaera