Hystrichosphaeridium xipheum
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"xipheum" (Maier, 1959, p.309, pl.30, fig.5) Sarjeant, 1964b, p.176. Holotype: Maier, 1959, pl.30, fig.5. Originally Galea (generic name illegitimate), subsequently Hystrichosphaeridium, thirdly Hystrichokolpoma?. Taxonomic senior synonym: Hystrichokolpoma rigaudiae, according to Sarjeant (1983, p.104). Age: Mid Miocene.
Parent: Hystrichosphaeridium