Trilobita - Phacopida - Phacopidae

Parent taxon: Phacopidae according to P. A. Jell and J. M. Adrain 2003

Sister taxa: Acernaspis, Acuticryphops, Afrops, Ananaspis, Babinops, Chotecops, Cryphops, Denckmannites, Dianops, Dienstina, Ductina, Eocryphops, Eophacops, Geesops, Kainops, Lochkovella, Nephranops, Nyterops, Omegops, Paciphacops, Pedinopariops, Phacopidella, Phacopinae, Phacops, Plagiolaria, Reedops, Signatops, Struveaspis, Zaplaops

Subtaxa: Trimerocephalus (Trifoliops)

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Ecology: fast-moving infaunal carnivore