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Hystrichosphaeridium

General Description Stratigraphy Literature Notes Species

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Age range (in million years)

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Image	Name	Original Description
	*aquitanicum*	Deunff, J. (1961a)
	*arborispinum*	Davey, R.J. and Williams, G.L. (1966b)
	*arborispinum ssp. arborispinum*	Davey, R.J. and Williams, G.L. (1966b)
	*arborispinum ssp. prolatum*	Duxbury, S. (2023)
	*assamicum*	Sah, S.C.D., Kar, R.K. and Singh, R.Y. (1970)
	*attadalense*	Cookson, I.C. and Eisenack, A. (1982)
	*biforme*	Wiesner, H. (1936)
	*bowerbankii*	Davey, R.J. and Williams, G.L. (1966b)
	*breviatum*	Morgenroth, P. (1966a)
	*brevispinum*	Davey, R.J. and Williams, G.L. (1966a)
	*calospinum*	He Chengquan, Zhu Shenzhao and Jin Guangxing (1989)
	*calvum*	Tasch, P. (1964)
	*cambayense*	Varma, C.P. and Dangwal, A.K. (1964)
	*castanea*	Eisenack, A. (1934)
	*conispiniferum*	Yun Hyesu (1981)
	*cylindratum*	Morgenroth, P. (1966a)
	*diversum*	Duxbury, S. (2018)
	*dowlingii*	Harland, R. (1973)
	*geometricum*	Deflandre, G. (1945a)
	*gliwicense*	Mackó, S. (1957)
	*grande*	Salujha, S.K., Srivastava, N.C. and Rawat, M.S. (1969)
	*granulatum*	Khanna, A.K. and Singh, H.P. (1981b)
	*hillii*	Merril, J.A. (1895)
	*hirsutum ssp. amplum*	Wetzel, W. (1952)
	*hymenohystrichum*	Liu Zhili, Liu Xuexian and Zheng Yuefang, (1992)
	*intermedium*	Wetzel, O. (1933b)
	*lateraliprocessum*	Srivastava, N.C. and Banerjee, D. (1969)
	*mantellii*	Davey, R.J. and Williams, G.L. (1966b)
	*mineralosum*	Varma, C.P. and Dangwal, A.K. (1964)
	*mineralosum ssp. jekhowskii*	Varma, C.P. and Dangwal, A.K. (1964)
	*mineralosum ssp. labiatum*	Varma, C.P. and Dangwal, A.K. (1964)
	*mineralosum ssp. mineralosum*	Varma, C.P. and Dangwal, A.K. (1964)
	*minus*	He Chengquan (1991)
	*moerense*	Vieira, M. et al. (2017)
	*multicornutum*	Kimyai, A. (1966)
	*oligacanthum ssp. velatum*	Wetzel, W. (1952)
	*paracostatum*	Cookson, I.C. and Eisenack, A. (1974)
	*parvum*	Davey, R.J. (1969b)
	*pattei*	Valensi, L. (1949)
	*patulum*	Davey, R.J. and Williams, G.L. (1966b)
	*patulum ssp. majus*	Yu Jingxian (1989)
	*patulum ssp. patulum*	Davey, R.J. and Williams, G.L. (1966b)
	*paucifurcatum*	Cookson, I.C. and Eisenack, A. (1961b)
	*perplexum*	Varma, C.P. and Dangwal, A.K. (1964)
	*petilum*	Gitmez, G.U. (1970)
	*polyradiatum*	Andreeva, E.M. (1966a)
	*procerum*	Williams, G.L., Fensome, R.A. (2025)
	*prolatum*	Williams, G.L., Fensome, R.A. (2025)
	*proprium*	Marheinecke, U. (1992)
	*quadratum*	Fensome, R.A., Nøhr-Hansen, H. and Williams, G.L., (2016b)
	*raritanianum*	Kimyai, A. (1966)
	*recurvatum*	White, H.H. (1842)
	*recurvatum ssp. parvum*	Rozen, B. (1965)
	*sahii*	Lentin, J.K. and Williams, G.L. (1993)
	*salpingophorum*	Deflandre, G. (1935)
	*senii*	Srivastava, N.C. and Banerjee, D. (1969)
	*sergipense*	Regali, M.S.P., Uesugui, N. and Santos, Y.S. (1974)
	*shuguangense*	Liu Zhili, Liu Xuexian and Zheng Yuefang, (1992)
	*spinipansatum*	Merril, J.A. (1895)
	*tenuitubatum*	Marheinecke, U. (1992)
	*truswelliae*	Wrenn, J.H. and Hart, G.F. (1988)
	*tubiferum*	Ehrenberg, C.G. (1837b)
	*tubiferum ssp. ovale*	Marheinecke, U. (1992)
	*tubiferum ssp. tubiferum*	Ehrenberg, C.G. (1837b)
	*verbinense*	Deflandre, G. (1946a)