Hystrichosphaeridium biforme
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?biforme Wiesner, 1936, p.154, pl.7, fig.9 ex Deflandre, 1946a, card 881. Holotype: Wiesner, 1936, pl.7, fig.9. Originally Hystrichosphaera (name not validly published), subsequently Hystrichosphaeridium, thirdly (and now) Hystrichosphaeridium?. Questionable assignment: Stover and Evitt (1978, p.56) as a problematic species. The name Hystrichosphaera biformis was not validly published in Wiesner (1936), since the generic name Hystrichosphaera was not validly published until 1937. Age: Late Cretaceous.
Parent: Hystrichosphaeridium