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Oligosphaeridium

General Description Stratigraphy Literature Notes Species

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Age range (in million years)

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Image	Name	Original Description
	*abaculum*	Davey, R.J. (1979a)
	*abbreviatum*	Xu Jinli, Pan Zhaoren, Yang Yumei, Zhu Youhua and Fan Naimin, (1997)
	*albertense*	Pocock, S.A.J. (1962)
	*anapetum*	Van Mourik, C.A., Brinkhuis, H. and Williams, G.L., (2001)
	*araneum*	Niechwedowicz, M. (2022)
	*asterigerum*	Gocht, H. (1959)
	*balticum*	Iakovleva, I., Aleksandrova, G.G., Mychko, E.V. (2021)
	*buciniferum*	Corradini, D. (1973)
	*byersense*	Duane, A.M. (1997)
	*complex*	White, H.H. (1842)
	*complex ssp. brevispinum*	()
	*dharmpurense*	Khanna, A.K. and Singh, H.P. (1981b)
	*diluculum*	Davey, R.J. (1982b)
	*dividuum*	Williams, G.L. (1978a)
	*djenn*	Below, R. (1982c)
	*dongmingense*	He Chengquan, Zhu Shenzhao and Jin Guangxing (1989)
	*fenestratum*	Duxbury, S. (1980)
	*granulatum*	He Chengquan (1991)
	*heilongjiangense*	Yu Jingxian (1982)
	*homomorphum*	He Chengquan, Zhu Shenzhao and Jin Guangxing (1989)
	*intermedium*	Corradini, D. (1973)
	*jixiense*	He Chengquan and Sun Xuekun (2000)
	*junctum*	Bailey, D.A. and Loy, A. (1997)
	*levimarginatum*	Marheinecke, U. (1992)
	*magnum*	Duxbury, S. (2019)
	*membranaceum*	Jiabo (1978)
	*minus*	Jiabo (1978)
	*ovatum*	He Chengquan, Zhu Shenzhao and Jin Guangxing (1989)
	*patulum*	Riding, J.B. and Thomas, J.E. (1988)
	*perforatum*	Gocht, H. (1959)
	*perforatum ssp. colum*	()
	perforatum*	Jain, K.P. (1977b)
	*poculum*	()
	*porosum*	Jain, K.P. (1977b)
	*pseudoabaculum*	Harding, I.C. (1990b)
	*pulcherrimum*	Deflandre, G. and Cookson, I.C. (1955)
	*quattroccioae*	Volkheimer, W. (2010)
	*reticulatum*	Davey, R.J. and Williams, G.L. (1966b)
	*saghirum*	Slimani, H., Louwye, S. and Toufiq, A., (2012)
	*sp. 1 of davey 1982b*	Davey, R.J. (1982b)
	*speciale*	Xu Jinli, Pan Zhaoren, Yang Yumei, Zhu Youhua and Fan Naimin, (1997)
	*suibinense*	Yu Jingxian (1982)
	*swanense*	Riding, J.B. and Helby, R. (2001f)
	*tenuiprocessum*	Singh, Ch. (1983)
	*totum*	Brideaux, W.W. (1971)
	*totum ssp. minus*	Brideaux, W.W. (1971)
	*totum var. minus*	Brideaux, W.W. (1971)
	*trabeculosum*	Singh, Ch. (1983)
	*tuberculatum*	Dolby, G. (2020)
	*tubulatum*	Menéndez, C.A. (1965)
	*umbraculum*	Duxbury, S. (2001)
	*vasiformum*	Neale, J.W. and Sarjeant, W.A.S. (1962)
	*verrucosum*	Davey, R.J. (1979b)
	*xinjiangense*	He Chengquan (1991)