Calcidiscus premacintyrei
Calcidiscus premacintyrei Theodoridis, 1984
Broadly elliptical species of Calcidiscus having a strongly elliptical central area. The central area is without structure. The proximal shield is birefringent.
Calcidiscus premacintyrei differs from Calcidiscus tropicus (Kamptner, 1955) Varol (1989) and Calcidiscus macintyrei (Bukry & Bramlette, 1969) Loeblich & Tappan (1978) by being elliptical. It is distinguished from Calcidiscus gallagheri da Gama & Varol (2013) by lacking porous plate in the central area.
Bukry, D. & Bramlette, M. N., (1969): Some new and stratigraphically useful calcareous nannofossils of the Cenozoic. - Tulane Studies in Geology. 7: 131-142.
da Gama, R. O. B. P. & Varol, O., (2013): New Late Oligocene to Miocene Species. - Journal of Nannoplankton Research. 33(1): 1-12.
Kamptner, E., (1955). Fossile Coccolithineen-Skelettreste aus Insulinde. Eine mikropaläontologische Untersuchung. - Verhandelingen der Koninklijke Nederlandse Akademie van Wetenschappen, Afdeling Natuurkunde. ser 2, 50: 1-105.
Loeblich, A. R. & Tappan, H., (1978): The coccolithophorid genus Calcidiscus Kamptner and its synonyms. - Journal of Paleontology. 52: 1390-1392.
Theodoridis, S., (1984): Calcareous nannofossil biostratigraphy of the Miocene and revision of the helicoliths and discoasters. - Utrecht Micropaleontological Bulletin. 32: 1-271.
Varol, O., (1989): Calcareous nannofossil study of the central and western Solomon Islands. - Circum-Pacific Council for Energy and Mineral Resources Earth Sciences. 239-268.
Holotype
Calcidiscus premacintyrei
Theodoridis, 1984
Middle Miocene
Giammoia 2, Sicily