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Opertorbitolitinae Loeblich & Tappan 1986

first appearance

Paleobiology Database
ypresian age
URI: http://resource.geosciml.org/classifier/ics/ischart/Ypresian

Attribution: International Chronostratigraphic Chart: http://www.stratigraphy.org/index.php/ics-chart-timescale

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Paleobiology Database

56 million years ago

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