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DescriptionCheirurus ingricus - trilobite - Smithsonian Museum of Natural History - 2012-05-17.jpg
English: A fossil Cheirurus ingricus on display in the Sant Hall of Oceans in the Smithsonian Museum of Natural History.
Cheirurus ingricus is a species of trilobite. Cheirurus ingricus appeared about 500 million years ago, and died out about 390 million years ago. This specimen was discovered in 1845 in the Enchinospaerites limestone in Russia.
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This image, originally posted to Flickr, was reviewed on 8 July 2012 by the administrator or reviewerSven Manguard, who confirmed that it was available on Flickr under the stated license on that date.
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{{Information |Description ={{en|1=A fossil Cheirurus ingricus on display in the Sant Hall of Oceans in the Smithsonian Museum of Natural History. Cheirurus ingricus is a species of trilobite. Cheirurus ingricus appeared about 500 million years ag...