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:
• Ordovician of Argentina (1 collection), Canada (8: Quebec), China (73), the Czech Republic (18), France (4), Iran (1), Ireland (1), Italy (3), Kazakhstan (3), Morocco (1), Norway (2), Sweden (11), the United Kingdom (26), United States (1: Maine)
• Llandeilo of China (4), the United Kingdom (1)
• Arenig of China (2), France (1), Norway (1), Sweden (4), the United Kingdom (5)
• Klabava of the Czech Republic (2)
• Dawan of China (1)
Total: 174 collections including 299 occurrences