Natland, M. L. (1938). New species of Foraminifera from off the west coast of North America and from the later Tertiary of the Los Angeles basin. <em>Bulletin of the Scripps Institution of Oceanography of the University of California, technical series.</em> vol. 4 n° 5 pp. 137-163.[details]
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2025). World Foraminifera Database. Cibicides spiralis Natland, 1938. Accessed at: https://www.marinespecies.org/Foraminifera/aphia.php?p=taxdetails&id=521608 on 2025-05-20
original descriptionNatland, M. L. (1938). New species of Foraminifera from off the west coast of North America and from the later Tertiary of the Los Angeles basin. <em>Bulletin of the Scripps Institution of Oceanography of the University of California, technical series.</em> vol. 4 n° 5 pp. 137-163.[details]
Present Inaccurate Introduced: alien Containing type locality