Hystrichosphaeridium asperum
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"asperum" Maier, 1959, p.319, pl.33, fig.2. Emendation: Sarjeant, 1983, p.113–114, as Polysphaeridium asperum. Holotype: Maier, 1959, pl.33, fig.2. NOW Polysphaeridium. Originally Hystrichosphaeridium, subsequently Polysphaeridium?, thirdly Dapsilidinium, fourthly (and now) Polysphaeridium. Age: middle Miocene.
Parent: Hystrichosphaeridium