Hystrichosphaera leptoderma
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"leptoderma" (Maier, 1959, p.321-322, pl.33, figs.5-6) Davey and Williams, 1969, p.5. 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). This combination was not validly published in Davey and Williams (1966b, p.104), since these authors did not fully reference the basionym. Age: mid Oligocene-Late Miocene.
Parent: Hystrichosphaera