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Membranosphaera bulluliniformis forma sphaerica

"Membranosphaera bulluliniformis forma sphaerica" Malyavkina in Samoilovitch and Mtchedlishvili, 1961, p.254-255, pl.84, fig.4.

TYPE: Holotype: Samoilovitch and Mtchedlishvili, 1961, pl.84, fig.4.

HISTORY: NOW: Membranosphaera bulluliniformis subsp. sphaerica. Originally Membranosphaera bulluliniformis forma sphaerica, subsequently (and now) Membranosphaera bulluliniformis subsp. sphaerica.

AGE: Mid Oxfordian-mid Valanginian.


Infraspecific taxa:


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