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Geological Time: Quaternary Holocene recent
the image is from a publication, which is cited in the table descriptions of the below cited book by
View of a specimen of Thalamophaga ramosa Rhumbler, 1911
The identification is based upon:
Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification. Van Nostrand, Reinhold Co. New York 1728 pp. Plate 10, Fig. 6