Hystrichosphaeridium horridum Deflandre, 1937b, p.74, pl.15 (al. pl.12), figs.7–8. Emendation: Masure, 1986, p.112–113, as Corradinisphaeridium horridum.

Now Corradinisphaeridium. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly (and now) Corradinisphaeridium.
Taxonomic junior synonym: Lanternosphaeridium (as Fibrocysta?) mutinense, according to Masure (1986, p.112).

Holotype: Deflandre, 1937, pl.15 [al. pl.12], figs.7-8; Masure, 1986, pl.1, figs.4-6, text-fig.2
Age: Senonian