Crepidolithus fossus Romein, 1977
Romein, A. J. T. 1977. Calcareous nannofossils from the Cretaceous/Tertiary boundary interval in the Barranco del Gredero (Caravaca, Prov. Murcia, S.E. Spain). II. Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen. B80: 269-279.
Romein, A. J. T., 1979. Lineages in Early Paleogene calcareous nannoplankton. Utrecht Micropaleontological Bulletin 22, 1-231.
Crepidolithus fossus
Romein, 1977
Early Paleocene
Barranco del Gredero. Caracava, Spain