Baltisphaeridium malum, Cramer, 1964

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

Holotype: Cramer, 1964, pl.1, fig.8
Age: Silurian (Ludlow)