Trilobita - Phacopida - Phacopidae
Parent taxon: Phacopidae according to A. C. Sandford 2004
See also Carvalho and Moody 2000
Sister taxa: Acernaspis, Acuticryphops, Adastocephalum, Afrops, Altaesajania, Ananaspis, Babinops, Boeckops, Burtonops, Chotecops, Denckmannites, Dianops, Dienstina, Drotops, Ductina, Echinophacopinae, Eldredgeops, Enigmapyge, Eocryphops, Eophacops, Illaenula, Inexpectatops, Kainops, Liolophops, Lochkovella, Nyterops, Paciphacops, Phacopidella, Phacops, Plagiolaria, Pulvinocephalus, Rabienops, Reedops, Rhinophacops, Rhinoreedops, Sambremeusaspis, Signatops, Struveaspis, Teichertops, Trifoliops, Trimerocephalus, Zaplaops
Subtaxa: Austerops Cryphops Echidnops Feistops Geesopini Geesops Houseops Morocops Pedinopariops Prokops Trimerocephaloides Viaphacops Weyerites
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Givetian of Venezuela (1 collection)
• Devonian of Algeria (1), Argentina (1), Australia (8), Belgium (6), Canada (1: Ontario), China (1), Colombia (1), France (2), Germany (45), Iran (1), Mongolia (1), Morocco (16), Spain (1), United States (19: Indiana, New York, Ohio, Pennsylvania, West Virginia)
Total: 105 collections including 125 occurrences