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Nahannagnostus pratti Choi et al. 2004

first appearance

Paleobiology Database
guzhangian age
URI: http://resource.geosciml.org/classifier/ics/ischart/Guzhangian

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

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Paleobiology Database

498.5 million years ago

(max)