Baltisphaeridium ramusculosum, (Deflandre, 1945), Downie, 1959

Now Oppilatala (an acritarch genus). Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Multiplicisphaeridium (an acritarch genus), fourthly (and now) Oppilatala (an acritarch genus); see also Evittia (an acritarch genus; combination not validly published) and Peteinosphaeridium (an acritarch genus; combination not validly published).

Holotype: Deflandre, 1945, pl.1, figs.8-10
Age: Silurian