Cyclagelosphaera? chronolitha Bukry, 1969
Haqius Roth, 1978; invalid according to ICN Art. 35.1 (its holotype Coccolithites circumradiatus Stover, 1966 is invalid again according to ICN Art. 35.1; because the genus Coccolithites is invalid )
Bukry, D., 1969. Upper Cretaceous coccoliths from Texas and Europe. University of Kansas Paleontological Contributions, Articles 51 (Protista 2), 1-79.
Stover, L. E., 1966. Cretaceous coccoliths and associated nannofossils from France and the Netherlands. Micropaleontology 12(2), 133-167.
Worsley, T. R., 1971. Calcareous nannofossil zonation of Upper Jurassic and Lower Cretaceous sediments from the Western Atlantic. In: Farinacci, A. (ed.), Proceedings of the Second Planktonic Conference Roma 1970. Edizioni Tecnoscienza, Rome vol. 2, pp. 1301-1321.