Spiniferites polyplasius (Maier, 1959, p.322–323, pl.33, figs.7–8) Sarjeant, 1983, p.96. Emendation: Sarjeant, 1983, p.96–97, as Spiniferites polyplasius.

Originally Hystrichosphaeridium, subsequently Hystrichosphaeridium?, thirdly (and now) Spiniferites.

Holotype: Maier, 1959, pl.33, fig.7; Sarjeant, 1983, pl.1, fig.3; pl.2, fig.2.
Age: Miocene.