Polysphaeridium? deflandrei (Valensi, 1947) Davey and Williams, 1969

Now Dapsilidinium?. Originally Hystrichosphaeridium, subsequently Polysphaeridium?, thirdly (and now) Dapsilidinium?. At the time of the transfer, Davey and Williams, 1969 questionably included this species in Polysphaeridium. This combination was not validly published in Davey and Williams, 1966, since
these authors did not fully reference the basionym. Davey and Williams, 1966 questionably included the species in Polysphaeridium.
Holotype: Valensi, 1947, text-fig.3
Age: Middle Jurassic