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Utiidae
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Body symmetry
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first appearance
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last appearance
mineralized skeleton contains
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number of fossil occurrences
skeleton contains
first appearance
Paleobiology Database
516 million years ago
(max)
Paleobiology Database
cambrian series 2 epoch
URI:
http://resource.geosciml.org/classifier/ics/ischart/CambrianSeries2
Attribution:
International Chronostratigraphic Chart: http://www.stratigraphy.org/index.php/ics-chart-timescale
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