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Discolithus theta Black & Barnes, 1959
Black, M. & Barnes, B. 1959. The structure of Coccoliths from the English Chalk. Geological Magazine. 96(5): 321-328.
Jakubowski, M., 1986. New calcareous nannofossil taxa from the Lower Cretaceous of the North Sea. INA Newsletter. 8, 38-42.
