Trilobita - Asaphida - Cyclopygidae
Full reference: P. E. Raymond. 1925. Some trilobites of the lower Middle Ordovician of eastern North America. Bulletin of the Museum of Comparative Zoölogy at Harvard College 67(1):1-180
Parent taxon: Cyclopygoidea according to J. M. Adrain 2011
See also Jell and Adrain 2002 and Whittington et al. 1997
Sister taxa: Nileidae, Symphysurinidae, Taihungshaniidae
Subtaxa: Amicus Aspidaeglina Bohemillidae Circulocrania Cyclopyge Degamella Ellipsotaphrus Emmrichops Gastropolus Girvanopyge Microparia Novakella Phylacops Pricyclopyginae Prospectatrix Psilacella Sagavia Selenoptychus Symphysops Xenocyclopyge
Ecology: nektonic microcarnivore
Distribution:
• Dobrotivian of the Czech Republic (2 collections), France (1), Morocco (1)
• Liben of the Czech Republic (1)
• Letna of the Czech Republic (1)
• Fennian of France (1)
• Volkhov of Sweden (4)
• Klabava of the Czech Republic (2)
• Arenig of China (2), France (1), Norway (1), Sweden (4), the United Kingdom (5)
• Dawan of China (1)
• Ordovician of Canada (8: Quebec), China (75), the Czech Republic (13), France (2), Iran (1), Ireland (1), Italy (3), Kazakhstan (3), Norway (2), Sweden (6), the United Kingdom (27), United States (1: Maine)
• Tremadoc of Argentina (1), China (2), the Czech Republic (1), Sweden (1)
Total: 174 collections including 299 occurrences