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Stratigraphic Significance of the Tertiary Echinoid Eupatagus ingens Zachos
Louis G. Zachos and Graig D. Shaak
Journal of Paleontology
Vol. 52, No. 4 (Jul., 1978), pp. 921-927
Published by: SEPM Society for Sedimentary Geology
Stable URL: http://www.jstor.org/stable/1303910
Page Count: 7
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Anterolateral petals of Eupatagus ingens Zachos grade from evenly lanceolate to distinctly oblanceolate with time. E. ingens also progressively increases in size through time. These progressive gradations can be used to define relative ages of E. ingens occurrences and regional age correlations of the Eocene and Oligocene.
Journal of Paleontology © 1978 SEPM Society for Sedimentary Geology