Hystrichosphaeropsis arctica
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arctica Matsuoka and Bujak, 1988, p.47-48, pl.5, figs.1a-b,2a-b,3,4a-b. Holotype: Matsuoka and Bujak, 1988, pl.5, figs.1a-b. Age: Late Miocene.
Parent: Hystrichosphaeropsis