Discolithus fenestratus Deflandre & Fert 1954
The length of the holotype is 4.3µm.
Species of Clausicoccus Prins (1979) less than 6.0 µm and having a central area with pores arranged in two complete concentric cycles. It is distinguished from Clausicoccus obrutus (Perch-Nielsen 1971c) Prins (1979) by having a porous central area whereas later has non-porous plates in the central area.
Deflandre, G., Fert, C., 1954. Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. Annales de Paléontologie 40, 115-176.
Perch-Nielsen, K., 1971c. Elektronenmikroskopische untersuchungen an Coccolithen und verwandten Formen aus dem Eozan von Danemark. Biologiske Skrifter, Kongelige Danske Videnskabernes Selskab. 18(3), 1-76.
Prins, B., 1979, Notes on nannology 1. Clausicoccus, a new genus of fossil Coccolithophorids. - INA Newsletter 1, N2-N4.
Discolithus fenestratus
Deflandre & Fert, 1954
Oligocene
Oamaru Diatomite, New Zelland