Baltisphaeridium cognitum Appendix A

cognitum (Timofeev, 1959, p.54-55, pl.4, fig.15) Downie and Sarjeant, 1965, p.88.  Holotype: Timofeev, 1959, pl.4, fig.15.  Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium.  This combination was not validly published in Downie and Sarjeant (1963, p.90), since these authors did not fully reference the basionym.  Age: Early-Mid Ordovician.

Parent: Baltisphaeridium