Polysphaeridium deflandrei

"?deflandrei" (Valensi, 1947, p.817; text-fig.3) Davey and Williams, 1969, p.6.  Holotype: Valensi, 1947, text-fig.3; Fauconnier and Masure, 2004, pl.21, figs.1–4.  NOW Dapsilidinium?.  Originally Hystrichosphaeridium, subsequently Polysphaeridium?, thirdly (and now) Dapsilidinium?.  Questionable assignment: Davey and Williams (1969, p.6).  This combination, as a qustionable assignment, was not validly published in Davey and Williams (1966b, p.95), since these authors did not fully reference the basionym.  Age: Middle Jurassic.

Parent: Polysphaeridium