Baltisphaeridium venustum, (Sannemann, 1955), Downie and Sarjeant, 1965

Now Hapsidopalla (an acritarch genus). Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly Multiplicisphaeridium (an acritarch genus), fourthly (and now) Hapsidopalla (an acritarch genus). This combination was not validly published in Downie and Sarjeant, 1963 since these authors did not fully reference the basionym.

Holotype: Sannemann, 1955, pl.5, fig.11
Age: Devonian (Late Givetian)