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Circulodinium

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Age range (in million years)

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Image	Name	Original Description
	*araneosum*	Brideaux, W.W. (1977)
	*asperum*	Singh, Ch. (1971)
	*asymmetricum*	Burger, D. (1980b)
	*attadalicum*	Cookson, I.C. and Eisenack, A. (1962b)
	*australe*	Burger, D. (1980b)
	*barbiferum*	Cookson, I.C. and Eisenack, A. (1982)
	*brevispinatum*	Millioud, M.E. (1969)
	*brevispinosum*	Pocock, S.A.J. (1962)
	*chinense*	He Chengquan (1991)
	*cingulatum*	He Chengquan, Wan Chuanbiao and Yang Mingjie (1999)
	*colliveri*	Cookson, I.C. and Eisenack, A. (1960b)
	*compta*	Davey, R.J. (1982b)
	*copei*	Bailey, D.A., Milner, P. and Varney, T. (1997)
	*deflandrei*	Alberti, G. (1961)
	*densebarbatum*	Cookson, I.C. and Eisenack, A. (1960b)
	*distinctum*	Deflandre, G. and Cookson, I.C. (1955)
	*distinctum ssp. distinctum*	Deflandre, G. and Cookson, I.C. (1955)
	*distinctum ssp. laevigatum*	Mehrota, N.C. and Sarjeant, W.A.S. (1986)
	distinctum ssp. longispinatum	Davey, R.J. (1978)
	*distinctum ssp. psilatum*	Yu Jingxian and Zhang Wangping (1980)
	*elongatum*	He Chengquan (1991)
	formosum	Iosifova, Ye. K. (1992)
	*hirtellum*	Alberti, G. (1961)
	*indicum*	Mehrotra, N.C. and Sarjeant, W.A.S. (1987)
	*insigne*	He Chengquan (1991)
	*kukebaiense*	Mao Shaozhi and Norris, G. (1988)
	*latoaculeum*	Yun Hyesu (1981)
	*micibaculatum*	Jiabo (1978)
	*paucispinum*	Davey, R.J. (1969a)
	*pentagonum*	He Chengquan (1991)
	*spinosum*	Boltenhagen, E. (1977)
	*vermiculatum*	Stover, L.E. and Helby, R. (1987c)
	*wulagenense*	He Chengquan (1991)