Baltisphaeridium horridum, (Deflandre, 1937), Downie and Sarjeant, 1965

Now Corradinisphaeridium. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly (and now) Corradinisphaeridium.
Tax. sr. synonym of Fibrocysta? mutinensis (Corradini, 1973) Stover and Evitt, 1978, according to Masure, 1986. This combination was not validly published in Downie and Sarjeant, 1963 since these authors did not fully reference the basionym.

Holotype: Deflandre, 1937, pl.15 [al. pl.12], figs.7-8
Age: Late Cretaceous