Palaeopontosphaera constans, distal view, Early Turonian, Cauvery Basin, India
Discolithus constans Górka, 1957
Black, M. & Barnes, B. 1959. The structure of Coccoliths from the English Chalk. Geological Magazine. 96(5): 321-328.
Górka, H. 1957. Les Coccolithophoridés du Maestrichtien supérieur de Pologne. Acta Palaeontologica Polonica. 2: 239-284