Trilobita - Phacopida - Pterygometopidae
Parent taxon: Pterygometopidae according to A. Roomusoks 1998
See also Owen and Harper 1982
Sister taxa: Calliops, Creatarginae, Eomonorachinae, Monorakinae, Pterygometopinae, Truncatometopus, Volkops, Yankaoia
Subtaxa: Bolbochasmops Chasmops Oculichasmops Rollmops Scopelochasmops Toxochasmops Uralops Valdariops
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Uhaku of Belarus (1 collection), the Russian Federation (2)
• Ordovician of Belarus (4), Belgium (2), Canada (12: Northwest Territories, Ontario, Quebec, Québec), Estonia (76), Germany (1), Latvia (5), Lithuania (12), the Netherlands (1), Norway (40), the Russian Federation (10), Sweden (17), the United Kingdom (21), United States (2: Ohio)
Total: 206 collections including 244 occurrences