Cyclagelosphaera? chronolitha Bukry, 1969
Coccolithites circumradiatus Stover, 1966 – This species was not validly published under ICN Art. 35.1 because the generic name Coccolithites was not validly published. Consequently, Haqius Roth, 1978, with Coccolithites circumradiatus designated as its type species, is considered not validly published under Arts. 6.3, 10.3 and 40.1, because its designated type-species name was not validly published. Subsequent combinations based on Coccolithites circumradiatus are also not validly published as new combinations because their proposed basionym was invalid (Arts. 6.10 and 41.1).
non - Markalius circumradiatus (Stover, 1966) Perch-Nielsen, 1968c
Esgia junior Worsley, 1971
Cyclococcolithus circumradiatus (Stover, 1966) Locker, 1973
Haqius circumradiatus (Stover, 1966) Roth, 1978
The combinations based on Coccolithites circumradiatus were not validly published because their proposed basionym was invalid (ICN Arts. 6.10 and 41.1).
Bukry, D. 1969. Upper Cretaceous coccoliths from Texas and Europe. University of Kansas Paleontological Contributions, Articles 51 (Protista 2): 1-79.
Locker, S., 1973. Coccolithineen aus dem Paläogen Mitteleuropas. Paläobotanik 3, 735-836.
Perch-Nielsen, K., 1968c. Der Feinbau und die Klassifikation der Coccolithen aus dem Maastrichtien von Danemark. Biologiske Skrifter, Kongelige Danske Videnskabernes Selskab 16: 1-96.
Roth, P. H. 1978. Cretaceous nannoplankton biostratigraphy and oceanography of the northwestern Atlantic Ocean. Initial Reports of the Deep Sea Drilling Project. 44: 731-760.
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.