Hystrichosphaeridium setigerfurcatum Timofeev, 1959

Now Baltisphaeridium. Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium. See also Archaeohystrichosphaeridium (combination not validly published).
Holotype: Timofeev, 1959, pl.4, fig.6
Age: Early Ordovician