Hystrichosphaeridium biforme

?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