Polysphaeridium amalthei

"?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