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Alterbia

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Age range (in million years)

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Image	Name	Original Description
	*acuminata*	Cookson, I.C. and Eisenack, A. (1958)
	*ambigua*	He Chengquan (1991)
	*amphiata*	McIntyre, D.J. (1975)
	*balmei*	Cookson, I.C. and Eisenack, A. (1960a)
	*bellula*	He Chengquan (1991)
	*curvicornis*	Vozzhennikova, T.F. (1967)
	*earnleyensis*	Islam, M.A. (1983b)
	*ectorugosa*	Archangelsky, S. (1969b)
	*microgranulata*	Stanley, E.A. (1965)
	*minor*	Alberti, G. (1959b)
	*montanaensis*	Harland, R. (1977a)
	*ovalis*	He Chengquan (1991)
	*pentaradiata ssp. pentaradiata*	Cookson, I.C. and Eisenack, A. (1965c)
	*pentaradiata ssp. preceda*	Cookson, I.C. and Eisenack, A. (1974)
	*pilosa*	Davey, R.J. (1969b)
	*polymorpha*	Malloy, R.E. (1972)
	*puyangensis*	He Chengquan, Zhu Shenzhao and Jin Guangxing (1989)
	*raijae*	Kjellström, G. (1973)
	*rhombohedra*	Benson, D.G. (1976)
	*subtilis*	Zheng Yahui and He Chengquan (1984)
	*xinjiangensis*	He Chengquan (1991)