Micrhystridium picorricum Appendix A

"picorricum" Cramer, 1964, p.303, pl.11, figs.1–3; text-fig.24.  Holotype: Cramer, 1964, pl.11, fig.2.  Originally Micrhystridium, subsequently Multiplicisphaeridium (Appendix A), thirdly Hystrichosphaeridium (combination not validly published).  Taxonomic senior synonym: Baltisphaeridium (now Multiplicisphaeridium) cladum Downie, 1963, an acritarch species, according to Colbath (1979, p.20–21).  Age: Devonian (middle Siegenian–Emsian).

Parent: Micrhystridium_Appendix A