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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
Stable URL: http://www.jstor.org/stable/1303910
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Stratigraphic Significance of the Tertiary Echinoid Eupatagus ingens Zachos
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Abstract

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.

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