Hystrichosphaeridium leptodermum
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"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: mid Oligocene-Late Miocene.
Parent: Hystrichosphaeridium