Hystrichosphaeridium alcicornu
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"alcicornu" Eisenack, 1954b, p.65, pl.10, figs.1–2; text-fig.5. Holotype: Eisenack, 1954b, pl.10, fig.2. NOW Achomosphaera. Originally Hystrichosphaeridium, subsequently (and now) Achomosphaera. Taxonomic junior synonyms: Galea lychnea and Hystrichosphaeridium leptodermum, both according to Sarjeant (1983, p.100–101). Age: Oligocene.
Parent: Hystrichosphaeridium