Baltisphaeridium neptunii, Eisenack, 1958

Now Achomosphaera?. Originally Baltisphaeridium, subsequently Achomosphaera, thirdly (and now) Achomosphaera?, fourthly Spiniferites, fifthly Florentinia?.

Holotype: Eisenack, 1958, pl.26, fig.7
Age: Early Cretaceous