Membranosphaera bulluliniformis forma typica Maliavkina in Samoilovitch and Mtchedlishvili, 1961

Name illegitimate. Nomenclatural jr. synonym of Membranosphaera bulluliniformis ssp. bulluliniformis, since it has the same holotype.
Holotype: Samoilovitch and Mtchedlishvili, 1961, pl.84, figs.1a-b
Age: Late Jurassic-Late Cretaceous