Membranosphaera bulluliniformis forma typica
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"forma typica" Malyavkina in Samoilovitch and Mtchedlishvili, 1961, p.253–254, pl.84, figs.1a–b,2a–b,3. Holotype: Samoilovitch and Mtchedlishvili, 1961, pl.84, figs.1a–b. Name illegitimate — nomenclatural senior synonym: Membranosphaera bulluliniformis subsp. bulluliniformis, which has the same holotype. Age: Late Jurassic–Late Cretaceous.
Parent: Membranosphaera bulluliniformis