Coccosphaera carterii Wallich 1877
Helicolith has a Type III (Helicosphaera carteri type) blanket, an expanded flange termination and a central area with two large semi-circular pores placed along the long axis of the coccolith.
Helicosphaera carteri carteri differs from Helicosphaera burkei Black (1971c) by having two large pores in the central area whereas the latter has a non-porous central area.
Helicosphaera carteri carteri is distinguished from Helicosphaera paleocarteri Theodoridis (1984) by having two pores placed on the axial suture whereas in the latter both pores are placed off the axial suture.
Excellent SEM photo compatible with the holotype was published by Konno & Jordan, 2006 (Pl. 4, Fig 10)
Konno, S., Jordan, R. W., 2006. Lagoon coccolithophorids from the Republic of Palau, NW Equatorial Pacific. Journal of Nannoplankton Research 28(2), 95-110.
Wallich, G. C., 1877. Observations on the coccosphere. Annals and Magazine of Natural History 19, 342-350.
Theodoridis, S., 1984. Calcareous nannofossil biostratigraphy of the Miocene and revision of the helicoliths and discoasters. Utrecht Micropaleontological Bulletin. 32, 1-271.
Kamptner, E., 1954. Untersuchungen über den Feinbau der Coccolithen. Archiv für Protistenkunde 100, 1-90.
Hay, W. W., Mohler, H. P., Roth, P. H., Schmidt, R. R., Boudreaux, J. E., 1967. Calcareous nannoplankton zonation of the Cenozoic of the Gulf Coast and Caribbean-Antillean area, and transoceanic correlation. - Transactions of the Gulf-Coast Association of Geological Societies 17, 428-480.
Black, M., 1971c. The systematics of coccoliths in relation to the paleontological record. In: Funnell, B. M., Riedel, W. R. (eds), The Micropaleontology of the Oceans. Cambridge University Press, Cambridge pp. 611-624.
Free-Floating, Indian Ocean or North Atlantic Ocean