none
Geological Time: Quaternary Holocene recent
holotype
View of a specimen of Cassidulina tumida Natland, 1938
The identification is based upon:
, : 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. Bulletin of the Scripps Institution of Oceanography of the University of California, technical series. vol. 4 n° 5 pp. 137-163. Plate , Fig.