Schizosphaerella oblongata Worsley, 1971
Thierstein, H. R., (1971): Tentative Lower Cretaceous Calcareous Nannoplankton Zonation. - Eclogae Geologicae Helvetiae. 64: 459-488.
Worsley, T. R., (1971): Calcareous nannofossil zonation of Upper Jurassic and Lower Cretaceous sediments from the Western Atlantic. In, Farinacci, A. (ed.) - Proceedings of the Second Planktonic Conference Roma 1970. Edizioni Tecnoscienza, Rome 2: 1301-1321.