Hystrichosphaeridium leptodermum

"leptodermum" Maier, 1959, p.321–322, pl.33, figs.5–6.  Holotype: Maier, 1959, pl.33, fig.5; Sarjeant, 1983, pl.1, fig.2; pl.6, figs.1–2; pl.7, fig.4.  Originally Hystrichosphaeridium, subsequently Hystrichosphaera, thirdly Spiniferites.  Taxonomic senior synonym: Hystrichosphaeridium (as Achomosphaera) alcicornu, according to Sarjeant (1983, p.100–101).  Age: middle Oligocene–late Miocene.

Parent: Hystrichosphaeridium