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Horologinella

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Age range (in million years)

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Image	Name	Original Description
	*anabarensis*	Pestchevitskaya, E.B. (2001)
	*angulata*	De Coninck, J. (1985)
	*apiculata*	Cookson, I.C. and Eisenack, A. (1962a)
	*biconvexa*	Jiabo (1978)
	*biconvexa ssp. biconvexa*	Jiabo (1978)
	*biconvexa ssp. granulata*	Liu Zhili, Liu Xuexian and Zheng Yuefang, (1992)
	*biconvexa ssp. laevigata*	Liu Zhili, Liu Xuexian and Zheng Yuefang, (1992)
	*coninckii*	Slimani, H. (1994)
	*corrugata*	De Coninck, J. (1986b)
	*dawanensis*	Liu Zhili, Liu Xuexian and Zheng Yuefang, (1992)
	*disparilis*	He Chengquan (1984b)
	*eclipsiana*	Riding, J.B. and Helby, R. (2001e)
	*extrema*	Cookson, I.C. and Eisenack, A. (1962a)
	*horologia*	Staplin, F.L. (1960)
	*incurvata*	Cookson, I.C. and Eisenack, A. (1962a)
	*lineata*	Cookson, I.C. and Eisenack, A. (1962a)
	*magnusa*	Liu Zhili, Liu Xuexian and Zheng Yuefang, (1992)
	*micirugis*	He Chengquan (1984b)
	*minuta*	Liu Zhili, Liu Xuexian and Zheng Yuefang, (1992)
	*obliqua*	Cookson, I.C. and Eisenack, A. (1962a)
	*pentagonalis*	Heilmann-Clausen, C. and Van Simaeys, S., (2005)
	*quadrispina*	Jardiné, S., Combaz, A., Magloire, L., Peniguel, G. and Vachey, G. (1972)
	*scabrosa*	He Chengquan (1984b)
	*sichuanensis*	Zhang Lujin (1984)
	*spinosa*	Cookson, I.C. (1965a)
	spinosigibberosa	()
	*tenuissima*	He Chengquan (1991)
	*wicanderi*	Martin, F. (1984)