Hystrichosphaeropsis borussica
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"borussica" (Eisenack, 1954b, p.62, pl.9, figs.5a-b,6-7) Sarjeant, 1966b, p.139. Holotype: Eisenack, 1954b, pl.9, fig.5a-b. Combination not validly published: basionym not fully referenced. 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: Hystrichosphaeropsis