Trilobita - Corynexochida - Illaenidae
Parent taxon: Corynexochida according to R. A. Fortey and D. L. Bruton 2013
See also Adrain 2011, Fortey and Droser 1999, Harrington and Leanza 1957, Rabano et al. 2014 and Whittington et al. 1997
Sister taxa: Brylyella, Cheilocephalidae, Chondagraulos, Corynexochidacea, Corynexochina, Corynexochoidea, Dolichometopidae, Granularapis, Granularaspidae, Hemibarrandiidae, Hunnanocephalus, Illaenina, Illaenoidea, Leiostegiina, Phillipsinellidae, Styginidae, Xuigiella
Subtaxa: Amphoriops Bumastoides Bumastus Caudillaenus Cryptonymus Dysplanus Eastonillaenus Ectillaenus Harpillaenus Hyboaspis Illaeninae Illaenurus Illaenus Nanillaenus Octillaenus Panderinae Parillaenus Platillaenus Ptilillaenus Stenopareia Thaleops Ulugtella Zbirovia Zdicella
Ecology: nektobenthic carnivore
Distribution:
• Niagaran of United States (2: Indiana, New York collections)
• Silurian of Argentina (1), Australia (1), Canada (57: Northwest Territories, Nunavut, Ontario, Quebec, Québec, Yukon Territory), China (5), the Czech Republic (13), Estonia (7), Greenland (6), Japan (2), Kazakhstan (1), Mexico (1), Norway (2), the Russian Federation (13), Sweden (8), Ukraine (7), the United Kingdom (20), United States (82: Arkansas, California, Illinois, Indiana, Iowa, New York, Wisconsin)
• Dobrotivian of the Czech Republic (2), France (2), Morocco (2), Portugal (8), Spain (12)
• Uhaku of Lithuania (1), the Russian Federation (3), Sweden (1)
• Letna of the Czech Republic (1)
• Whiterockian of Canada (58: Newfoundland, Newfoundland and Labrador, Northwest Territories, Quebec), Norway (1), United States (60: California, Nevada, New York, Oklahoma, Vermont)
• Chazyan of Canada (24: Newfoundland and Labrador, Northwest Territories, Quebec), United States (57: New York, Oklahoma, Tennessee)
• Volkhov of the Russian Federation (13)
• Valaste of Sweden (3)
• Hunderum of Sweden (3)
• Arenig of Argentina (5), Canada (1: Newfoundland and Labrador), China (15), Sweden (1), the United Kingdom (4)
• Arenigian of China (16)
• Dawan of China (4)
• Ordovician to Silurian of Canada (3: Québec), Norway (1)
• Canadian of China (4)
• Ordovician of Argentina (10), Australia (11), Belarus (1), Belgium (9), Canada (75: Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Nunvait, Ontario, Quebec, Québec, Yukon), China (74), the Czech Republic (14), Estonia (10), France (1), Iran (6), Ireland (6), Italy (3), Kazakhstan (7), Lithuania (4), Malaysia (1), Morocco (12), the Netherlands (1), New Zealand (1), Norway (68), Portugal (2), the Russian Federation (21), Spain (21), Sweden (76), the United Kingdom (54), United States (115: California, Illinois, Illinois, Iowa, Iowa/Wisconsin, Kentucky, Maine, Minnesota, Missouri, Nevada, New York, Oklahoma, Tennessee, Utah, Virginia, Wisconsin)
• Tremadoc of Canada (1: Northwest Territories), China (8)
• Ibexian of United States (2: Nevada)
• Cambrian of Canada (4: Alberta), United States (13: Colorado, Minnesota, South Dakota, Utah, Wisconsin, Wyoming)
Total: 1164 collections including 1566 occurrences