Phacopidae is a family of trilobites of the order Phacopida. This is a large and extensive family. Some Genera. Acernaspis, Acuticryphops, Adastocephalum, Afrops, Ainasuella, Altaesajania, Ananaspis, Angulophacops, Arduennops, Atopophacops, Babinops, Boeckops, Burtonops, Chotecops, Cryphops, Cultrops, Denckmannites, Dianops, Dienstina, Drotops, Ductina, Echidnops, Echinophacops, Eldredgeops, Eocryphops, Eophacops, Geesops, Hypsipariops, Illaenula, Kainops, Liolophops, Lochkovella, Nandanaspis, Nephranomma, Nephranops, Nyterops, Omegops, Orygmatos, Paciphacops, Pedinopariops, Phacopidella, Phacops, Plagiolaria, Portlockia, Prokops, Rabienops, Reedops, Rhinophacops, Rhinoreedops, Sambremeuaspis, Signatops, Somatrikelon, Spinicryphops, Struveaspis, Struveops, Tangbailaspis, Teichertops, Toxop