Multiplicisphaeridium meson [Eisenack, 1955 nom. subst. pro Hystrichosphaeridium intermedium Eisenack, 1954 non
Hystrichosphaeridium intermedium (O. Wetzel, 1933) Deflandre, 1937] Eisenack et al., 1973

Now Visbysphaera meson (an acritarch species). Originally Hystrichosphaeridium intermedium (name illegitimate), subsequently Hystrichosphaeridium meson, thirdly Baltisphaeridium meson (an acritarch species), fourthly (and now)
Visbysphaera meson (an acritarch species), fifthly Multiplicisphaeridium meson. Tax. sr. synonym of the acritarch species Multiplicisphaeridium micropilare Cramer, 1970 ex Eisenack et al., 1979, according to Ye Xiaorong, 1984.
Holotype: Eisenack, 1954, pl.1, fig.3
Age: Silurian (Late Llandovery-Late Ludlow)