Hystrichosphaeridium polyplasium Maier, 1959

Now Spiniferites. Originally Hystrichosphaeridium, subsequently Hystrichosphaeridium?, thirdly (and now) Spiniferites.
Davey and Williams, 1966, questionably included this species in Hystrichosphaeridium.
Holotype: Maier, 1959, pl.33, fig.7; Sarjeant 1983, pl.1, fig.3, pl.2, fig.2
Age: Miocene