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names
first appearance
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Body symmetry
extinction status
first appearance
habitat
last appearance
motility
number of fossil occurrences
skeleton contains
trophic guild
first appearance
Paleobiology Database
485.4 million years ago
(max)
Paleobiology Database
ordovician period
URI:
http://resource.geosciml.org/classifier/ics/ischart/Ordovician
Attribution:
International Chronostratigraphic Chart: http://www.stratigraphy.org/index.php/ics-chart-timescale
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