Silicisphaera ferox (Deflandre, 1937) Davey and Verdier, 1976

Now Florentinia. Originally Hystrichosphaeridium, subsequently Baltisphaeridium (an acritarch genus), thirdly Hystrichokolpoma, fourthly Silicisphaera, fifthly (and now) Florentinia.
Holotype: Deflandre, 1937, pl.14 [al. pl.11], figs.3-4
Age: Senonian