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Kallosphaeridium

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Age range (in million years)

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Max

Image	Name	Original Description
	*aspersum*	Jiabo (1978)
	*biornatum*	()
	*brevibarbatum*	De Coninck, J. (1969)
	*callosum*	Dodekova, L. (1994)
	*capulatum*	()
	*circulare*	Cookson, I.C. and Eisenack, A. (1971)
	*coninckii*	Burger, D. (1980a)
	*dolomiticum*	Torricelli, S. (2000)
	*granulatum*	Norvick, M.S. and Burger, D. (1976)
	*helbyi*	Cookson, I.C. and Hughes, N.F. (1964)
	*helbyi ssp. helbyi*	Cookson, I.C. and Hughes, N.F. (1964)
	*helbyi ssp. psilatum*	Burger, D. (1980a)
	*hypornatum*	()
	*inornatum*	Batten, D.J. and Lister, J.K. (1988)
	*jiyangense*	Xu Jinli, Pan Zhaoren, Yang Yumei, Zhu Youhua and Fan Naimin, (1997)
	*nigeriense*	Jan du Chêne, R., Stover, L.E. and De Coninck, J. (1985a)
	*orchiesense*	De Coninck, J. (1975)
	*parvum*	Jan du Chêne, R. (1988)
	*praussii*	Prauss, M. (1989)
	*reticuloidum*	Jiabo (1978)
	*ringnesiorum*	Manum, S. and Cookson, I.C. (1964)
	*romaense*	Burger, D. (1980a)
	*spongiosum*	Batten, D.J. and Lister, J.K. (1988)
	*yorubaense*	Jan du Chêne, R. and Adediran, S.A. (1985)