Baltisphaeridium setigerfurcatum, (Timofeev, 1959), Downie and Sarjeant, 1965

Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium; see also Archaeohystrichosphaeridium (an acritarch genus; combination not validly published). This combination was not validly published in Downie and Sarjeant, 1963 since these authors did not fully reference the basionym.

Holotype: Timofeev, 1959, pl.4, fig.6
Age: Early Ordovician