Trilobita - Phacopida - Pterygometopidae
Parent taxon: Phacopoidea according to J. M. Adrain 2011
See also Jell and Adrain 2002 and Whittington et al. 1997
Sister taxon: Phacopidae
Subtaxa: Calliops Chasmopinae Creatarginae Eomonorachinae Monorakinae Pterygometopinae Truncatometopus Volkops Yankaoia
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Silurian of the United Kingdom (9 collections)
• Ordovician to Silurian of the Russian Federation (1)
• Ordovician of Belarus (5), Belgium (3), Canada (86: British Columbia, Newfoundland, Northwest Territories, Nunavut, Nunvait, Ontario, Quebec), China (2), Estonia (80), France (1), Germany (1), Ireland (10), Latvia (10), Lithuania (12), the Netherlands (1), Norway (56), Portugal (1), the Russian Federation (96), Spain (5), Sweden (54), the United Kingdom (51), United States (168: Alaska, California, Colorado, Georgia, Illinois, Illinois, Iowa, Indiana, Iowa/Wisconsin, Kentucky, Minnesota, Missouri, Nevada, New York, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia)
• Chazy of United States (16: New York)
• Llandeilo of the United Kingdom (1)
• Whiterockian of Canada (13: Newfoundland and Labrador, Northwest Territories, Quebec), United States (21: Nevada, New York, Oklahoma, Vermont, Virginia)
• Arenig of China (1), France (1), Morocco (1)
Total: 706 collections including 852 occurrences