Artiopoda - Corynexochida - Illaenuridae
Parent taxon: Leiostegiina according to J. M. Adrain 2011
See also Whittington et al. 1997
Sister taxa: Leiostegioidea, Shirakiellidae
Subtaxa: Ambonolium Illaenurus Lecanopyge Lecanopygidae Minicephalus Olenekella Platydiamesus Polyariella Rasettaspis Rasettia Resseraspis Tatonaspis Yurakia
Type: Illaenurus
Ecology: nektobenthic carnivore
Distribution:
• Ordovician of Canada (1: Yukon collection), South Korea (1), United States (4: Idaho, Texas)
• Taoyuanian of the Russian Federation (2)
• Cambrian of Argentina (1), Canada (39: Alberta, Newfoundland and Labrador, Northwest Territories, Quebec, Yukon), the Russian Federation (8), United States (34: Alaska, Colorado, Minnesota, Montana, Nevada, Oklahoma, South Dakota, Utah, Vermont, Wisconsin, Wyoming)
Total: 90 collections including 117 occurrences