Phacops ("Lens-face") is a genus of trilobite in the order Phacopida, suborder Phacopina, superfamily Phacopoidea. They have a very widespread distribution, being found in Morocco, Europe, Australia and North America. They lived during the Devonian and are great index fossils. Often confused/combined with Paciphacops, Kainops, Reedops, Eldredgeops, Chotecops, Viaphacops, Drotops, Eophacops and the superfamily Acastoidea.
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