Hystrichosphaeridium amalthei
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"amalthei" Wetzel, 1966, p.317, pl.31, figs.2,2a–b. Holotype: Wetzel, 1966, pl.31, figs.2,2a. NOW Dapsilidinium?. Originally Hystrichosphaeridium, subsequently Polysphaeridium, thirdly Polysphaeridium?, fourthly (and now) Dapsilidinium?. Age: late Toarcian.
Parent: Hystrichosphaeridium