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Polysphaeridium amalthei

"Polysphaeridium? amalthei" (W. Wetzel, 1966, p.317, pl.31, figs.2,2a-b) Riley and Sarjeant, 1972, p.2.

TYPE: Holotype: W. Wetzel, 1966, pl.31, figs.2,2a.

HISTORY: NOW: Dapsilidinium?. Originally Hystrichosphaeridium, subsequently Polysphaeridium, thirdly Polysphaeridium?, fourthly (and now) Dapsilidinium?. Questionable assignment: Stover and Evitt (1978, p.76).

AGE: Late Toarcian.


Infraspecific taxa:


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