Biscutum romeinii Perch-Nielsen, 1981
Perch-Nielsen, K., (1981): New Maastrichtian and Paleocene calcareous nannofossils from Africa, Denmark, and USA and the Atlantic, and some Paleocene lineages. - Eclogae Geologicae Helvetiae. 74(3): 831-863.
Varol, O., (1989): Palaeocene calcareous nannofossil biostratigraphy. In, Crux, J. A. & van Heck, S. E. (eds) Nannofossils and their applications: Proceedings of the 2nd INA Conference, London 1987. - British Micropalaeontological Society Publication Series. 265-310.