Hystrichosphaeridium meson Eisenack, 1955, nom. subst. pro Hystrichosphaeridium intermedium Eisenack, 1954, non Hystrichosphaeridium intermedium (O.Wetzel, 1933) Deflandre 1937

Now Visbysphaera meson. Originally Hystrichosphaeridium intermedium (name illegitimate), subsequently Hystrichosphaeridium meson, thirdly Baltisphaeridium meson, fourthly (and now) Visbysphaera meson, fifthly Multiplicisphaeridium meson.
Tax. sr. synonym of Multiplicisphaeridium (al. Baltisphaeridium) micropilare Cramer, 1970 ex Eisenack et al., 1973 according to Ye Xiaorong, 1984.
Holotype: Eisenack, 1954, pl.1, fig.3
Age: Silurian (Late Llandovery-Late Ludlow)