Polysphaeridium? amalthei (W. Wetzel, 1966) Riley and Sarjeant, 1972

Now Dapsilidinium?. Originally Hystrichosphaeridium, subsequently Polysphaeridium, thirdly Polysphaeridium?, fourthly (and now) Dapsilidinium?. Stover and Evitt, 1978 considered this to be a "provisionally accepted species" of Polysphaeridium. Holotype: W. Wetzel, 1966, pl.31, figs.2,2a
Age: Late Toarcian