Trilobita - Olenida - Olenidae
Parent taxon: Olenida according to J. M. Adrain 2011
See also Bao and Jago 2000, Harrington and Leanza 1957, Robison and Pantoja-Alor 1968, Walcott 1908 and Whittington et al. 1997
Sister taxa: Andrarinidae, Aphelaspidae, Asaphiscidae, Cedariidae, Dokimokephalidae, Eulomidae, Idahoiidae, Loganellidae, Parabolinoididae, Pterocephaliidae
Subtaxa: Acerocare Acerocarina Aciculolenus Angelina Apoplanias Asilluchus Baikonuraspis Balnibarbiinae Bondarevites Chekiangaspis Ctenopyge Cyclognathina Euonchonotina Eurycare Hancrania Helieranella Highgatella Huangshiaspis Hypermecaspidinae Hypermecaspis Inkouia Jujuyaspis Leiobienvillia Leptobenthos Leptoplastinae Leptoplastus Lisania Magnomma Marjumia Nericiaspis Oleninae Olenus Parabolina Parabolinella Parabolinina Parabolinites Paraolenus Paraplicatolina Peltocare Peltura Pelturina Pelturinae Plicatolininae Prohedinella Protopeltura Remizites Rhodonaspis Saltaspis Sphaerophthalmella Talbotinella Ullaspis Westergaardia Westergaardites Wujiajiania
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Ordovician of Argentina (248 collections), Bolivia (11), Canada (62: Alberta, British Columbia, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Ontario, Quebec, Québec, Yukon), China (10), Colombia (1), the Czech Republic (1), France (4), Iran (1), Ireland (1), Mexico (27), Morocco (2), New Zealand (1), Norway (22), Peru (1), the Russian Federation (1), Sweden (10), the United Kingdom (26), United States (78: Alaska, California, Kentucky, Michigan, Nevada, New Mexico, New York, Ohio, Pennsylvania, Texas, Utah, Vermont), Venezuela (2)
• Whiterockian of Canada (12: Newfoundland and Labrador), Norway (4)
• Arenig of Argentina (5), Australia (1), Bolivia (4), China (1), Norway (4), Sweden (3), United States (1: Nevada)
• Arenigian of Argentina (34)
• Ayusokkanian of Kazakhstan (8)
• Marjumian of Greenland (9)
• Cambrian to Ordovician of Australia (3), Poland (1)
• Cambrian of Argentina (55), Australia (2), Canada (21: Alberta, British Columbia, Newfoundland, Newfoundland and Labrador, Quebec, Yukon), China (64), Greenland (2), India (1), Kazakhstan (46), Norway (37), Poland (5), the Russian Federation (25), South Korea (2), Spain (1), Sweden (17), Turkey (1), the United Kingdom (9), United States (42: Alaska, Arkansas, Nevada, Nevada and Utah, New Mexico, Pennsylvania, Texas, Utah)
Total: 929 collections including 1609 occurrences