Polysphaeridium amalthei
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"?amalthei" (Wetzel, 1966, p.317, pl.31, figs.2,2a–b) Riley and Sarjeant, 1972, p.2. Holotype: Wetzel, 1966, pl.31, figs.2,2a. NOW Dapsilidinium?. Originally Hystrichosphaeridium, subsequently Polysphaeridium, thirdly Polysphaeridium?, fourthly (and now) Dapsilidinium?. Questionable assignment: Stover and Evitt (1978, p.76). Age: late Toarcian.
Parent: Polysphaeridium