Buedingiisphaeridium microspinosum, (Eisenack, 1954), Gardiner and Vanguestaine, 1971

Combination not validly published since Gardiner and Vanguestaine, 1971 did not fully reference the basionym.
Now Visbysphaera (an acritarch genus). Originally Hystrichosphaeridium, subsequently Baltisphaeridium (an acritarch genus), thirdly Lophosphaeridium (an acritarch genus), fourthly (and now) Visbysphaera (an acritarch genus), fifthly Buedingiisphaeridium (combination not validly published).

Holotype: Eisenack, 1954, pl.1, fig.8
Age: Silurian (Late Llandovery)