Membranosphaera bulluliniformis

bulluliniformis Malyavkina in Samoilovitch and Mtchedlishvili, 1961, p.253–254, pl.84, figs.1a–b,2a–b,3–4.  Holotype: Samoilovitch and Mtchedlishvili, 1961, pl.84, figs.1a–b.  Malyavkina in Samoilovitch and Mtchedlishvili (1961) expressly cited this taxon as a species; it was not therefore a new combination in Lentin and Williams (1973, p.94).  Age: Oxfordian–Early Cretaceous.

Parent: Membranosphaera

Infrataxon List:

"Membranosphaera bulluliniformis forma bulluliniformis"
"Membranosphaera bulluliniformis forma sphaerica"
"Membranosphaera bulluliniformis forma typica"
Membranosphaera bulluliniformis subsp. bulluliniformis
Membranosphaera bulluliniformis subsp. sphaerica