Circulocrania is an extinct genus from a well known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago.
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| http://dbkwik.webdatacommons.org | 14 |
![[RDF Data]](/fct/images/sw-rdf-blue.png)
