Circulocrania
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Circulocrania is an extinct genus of trilobites in the family Cyclopygidae. The genus lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago.
Circulocrania is an extinct genus of trilobites in the family Cyclopygidae. The genus lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago.
References
Text derived from https://en.wikipedia.org/w/index.php?oldid=1264774069 under CC BY-SA 4.0; modifications have been made.