†family Nileidae Angelin 1854 (trilobite)

Artiopoda - Asaphida - Nileidae

Parent taxon: Cyclopygoidea according to J. M. Adrain 2011

See also Fortey and Droser 1999, Harrington and Leanza 1957 and Whittington et al. 1997

Sister taxa: Cyclopygidae, Symphysurinidae, Taihungshaniidae

Subtaxa: Aocaspis Barrandia Berkutaspis Borthaspidella Bumastides Elongatanileus Homalopteon Illaenopsis Kodymaspis Lakaspis Neopsilocephalina Nileidae stenorhachis Nileus Parabarrandia Paraperaspis Peraspis Petrbokia Platypeltoides Poronileus Psilocephalinella Shenjiawania Symphysurina Symphysurus Varvia

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Ecology: fast-moving low-level epifaunal carnivore

Distribution:

• Uhaku of Sweden (5 collections)

• Dobrotivian of Czechia (1), Portugal (1), Spain (3)

• Chazyan of Canada (4: Newfoundland and Labrador)

• Whiterockian of Canada (24: Newfoundland, Newfoundland and Labrador), Norway (4), United States (29: Nevada, Oklahoma, Utah)

• Langevoja of Sweden (4)

• Hunderum of Sweden (6)

• Billingen of Norway (1), Sweden (6)

• Klabava of Czechia (1), France (1)

• Arenig of Argentina (3), China (22), France (3), Morocco (1), Norway (3), the Russian Federation (1), Sweden (4), the United Kingdom (2)

• Arenigian of Canada (2: Northwest Territories), China (16)

• Dawan of China (3)

• Ordovician of Argentina (12), Australia (1), Canada (37: Alberta, British Columbia, Newfoundland, Newfoundland and Labrador, Northwest Territories, Yukon), China (87), Colombia (1), Czechia (5), Estonia (1), France (7), Greenland (4), Iran (6), Ireland (9), Kazakhstan (3), Morocco (3), Norway (15), the Russian Federation (23), Spain (1), Sweden (42), the United Kingdom (33), United States (64: Alaska, British Columbia, California, Idaho, Maine, Montana, Nevada, New Mexico, New York, Oklahoma, Texas, Utah, Vermont, Virginia)

• Ibexian of Norway (2), United States (3: California, Nevada)

• Skullrockian of Canada (21: British Columbia, Newfoundland), Greenland (1), United States (25: New York, Texas, Utah)

• Cambrian to Ordovician of Argentina (1), Canada (1: Quebec), the Russian Federation (1)

• Cambrian of Canada (4: Newfoundland and Labrador), China (10), the Russian Federation (3), United States (10: Texas, Utah)

Total: 586 collections including 720 occurrences

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