Hystrichosphaeridium amalthei W. Wetzel, 1966

Now Dapsilidinium?. Originally Hystrichosphaeridium, subsequently Polysphaeridium, thirdly Polysphaeridium?, fourthly (and now) Dapsilidinium?.

Holotype: W. Wetzel, 1966, pl.31, figs.2,2a
Age: Late Toarcian