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Prosechamyiidae
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Body symmetry
behavioral circadian rhythm
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number of fossil occurrences
skeleton contains
first appearance
Paleobiology Database
norian age
URI:
http://resource.geosciml.org/classifier/ics/ischart/Norian
Attribution:
International Chronostratigraphic Chart: http://www.stratigraphy.org/index.php/ics-chart-timescale
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Paleobiology Database
228 million years ago
(max)