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Phacops
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Phacops
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Phacops
Phacops A fossil of the trilobite Phacops rana.

Phacops

trilobite genus
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Phacops, genus of trilobites (an extinct group of aquatic arthropods) found as fossils in Silurian and Devonian rocks (between about 359 million and 444 million years old) in Europe and North America. Phacops is a common and easily recognizable form, with its rounded rather than angular outline, globose head region, and large compound eyes. A common form is the species Phacops rana.

This article was most recently revised and updated by Richard Pallardy.