†family Nileidae Angelin 1854 (trilobite)

Trilobita - 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:

• Ordovician of Argentina (13 collections), Australia (1), Canada (61: Alberta, British Columbia, Newfoundland, Newfoundland and Labrador, Northwest Territories, Yukon), China (81), Colombia (1), the Czech Republic (7), Estonia (1), France (7), Greenland (5), Iran (6), Ireland (8), Kazakhstan (2), Morocco (3), Norway (18), Portugal (1), the Russian Federation (23), Spain (4), Sweden (67), the United Kingdom (32), United States (91: Alaska, British Columbia, California, Idaho, Maine, Montana, Nevada, New Mexico, New York, Texas, Utah, Vermont, Virginia)

• Llandeilo of Canada (1: Northwest Territories), China (3), Sweden (3), the United Kingdom (1)

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

• Castlemainian of Ireland (1)

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

• Dawan of China (3)

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

• Klabava of the Czech Republic (2), France (1)

• Cambrian to Ordovician of 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: 590 collections including 729 occurrences

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