Buedingiisphaeridium brevispinosum ssp. callosum, (Sannemann, 1955), Moreau-Benoit, 1974

Combination not validly published since the specific name Buedingiisphaeridium brevispinosum is not validly published.
Now Baltisphaeridium brevispinosum ssp. callosum (an acritarch subspecies). Originally Hystrichosphaeridium brevispinosum ssp. callosum, subsequently Buedingiisphaeridium brevispinosum ssp. callosum (combination not validly published), thirdly (and now) Baltisphaeridium brevispinosum ssp. callosum (an acritarch subspecies). This combination was not validly published in Moreau-Benoit, 1974 additionally since that author did not specify the taxonomic rank.

Holotype: Sannemann, 1955, pl.4, fig.3
Age: Devonian (Late Givetian)