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Membranosphaera

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Age range (in million years)

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Image	Name	Original Description
	*bulluliniformis*	Samoilovitch, S.R. and Mtchedlishvili, N.D. (eds.) (1961)
	bulluliniformis forma bulluliniformis	Samoilovitch, S.R. and Mtchedlishvili, N.D. (eds.) (1961)
	bulluliniformis forma sphaerica	Samoilovitch, S.R. and Mtchedlishvili, N.D. (eds.) (1961)
	bulluliniformis forma typica	Samoilovitch, S.R. and Mtchedlishvili, N.D. (eds.) (1961)
	*bulluliniformis ssp. bulluliniformis*	Samoilovitch, S.R. and Mtchedlishvili, N.D. (eds.) (1961)
	*bulluliniformis ssp. sphaerica*	Samoilovitch, S.R. and Mtchedlishvili, N.D. (eds.) (1961)
	coninckii	()
	granulata	Norvick, M.S. and Burger, D. (1976)
	*maastrichtica*	Samoilovitch, S.R. and Mtchedlishvili, N.D. (eds.) (1961)
	*maastrichtica ssp. maastrichtica*	Samoilovitch, S.R. and Mtchedlishvili, N.D. (eds.) (1961)
	*maastrichtica ssp. pilata*	Samoilovitch, S.R. and Mtchedlishvili, N.D. (eds.) (1961)
	maastrichtica var. maastrichtica	Samoilovitch, S.R. and Mtchedlishvili, N.D. (eds.) (1961)
	maastrichtica var. pilata	Samoilovitch, S.R. and Mtchedlishvili, N.D. (eds.) (1961)
	norvickii	Burger, D. (1980a)
	romaensis	()
	*rugosa*	Shaw Chenglong and Huang Tsengchieng, (1994)
	sp. sensu chateauneuf 1980	Chateauneuf, J.-J. (1980)
	*taiwaniana*	Shaw Chenglong and Huang Tsengchieng, (1994)
	*tuberculata*	Samoilovitch, S.R. and Mtchedlishvili, N.D. (eds.) (1961)