Spiniferites leptodermus (Maier, 1959) Sarjeant, 1970

Originally Hystrichosphaeridium, subsequently Hystrichosphaera, thirdly Spiniferites.
Taxonomic senior synonym: Hystrichosphaeridium (as Achomosphaera) alcicornu, according to Sarjeant (1983, p.100).

Holotype: Maier, 1959, pl.33, fig.5; Sarjeant, 1983, pl.1, fig.2, pl.6, figs.1-2, pl.7, fig.4
Age: Middle Oligocene-Late Miocene