Baltisphaeridium balticum, (Eisenack, 1951), Cramer, 1970

Now Goniosphaeridium (an acritarch genus). Originally Hystrichosphaeridium, subsequently Veryhachium (an acritarch genus), thirdly (and now) Goniosphaeridium (an acritarch genus), fourthly Baltisphaeridium; see also Pulvinosphaeridium (an acritarch genus; combination not validly published).

Holotype: Eisenack, 1951, pl.3 fig.10
Age: Early Ordovician