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 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:
• Uhaku of Norway (1 collection), Sweden (2)
• Whiterockian of Canada (12: Newfoundland and Labrador), Norway (4)
• Chazyan of Canada (4: Newfoundland and Labrador, Northwest Territories)
• Arenig of Argentina (8), Australia (1), Bolivia (4), China (1), Norway (4), Sweden (3), United States (1: Nevada)
• Arenigian of Argentina (36)
• Ordovician of Argentina (72), Bolivia (2), Canada (31: Alberta, British Columbia, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Ontario, Quebec, Québec, Yukon), China (5), Ireland (1), Morocco (1), New Zealand (1), Norway (12), Peru (1), the Russian Federation (1), Sweden (6), the United Kingdom (25), United States (72: Alaska, California, Kentucky, Michigan, Montana, Nevada, New Mexico, New York, Ohio, Pennsylvania, Texas, Utah), Venezuela (1)
• Cressagian of the United Kingdom (4)
• Tremadoc of Argentina (184), Bolivia (10), Canada (29: Alberta, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Yukon), China (8), Colombia (1), the Czech Republic (1), France (4), Iran (1), Mexico (27), Morocco (1), Norway (3), Sweden (2), the United Kingdom (1), United States (4: Texas, Vermont), Venezuela (1)
• Ibexian of Norway (4), United States (1: California)
• Skullrockian of Argentina (2), United States (4: Nevada, Texas, Utah)
• Taoyuanian of China (9), the Russian Federation (17), South Korea (1), Turkey (1)
• Amgan of the Russian Federation (1)
• Cambrian of Argentina (59), Australia (5), Canada (21: Alberta, British Columbia, Newfoundland, Newfoundland and Labrador, Quebec, Yukon), China (54), Greenland (11), India (1), Kazakhstan (54), Mongolia (1), Norway (43), Poland (6), the Russian Federation (9), South Korea (1), Spain (1), Sweden (19), the United Kingdom (12), United States (43: Alaska, Arkansas, Nevada, Nevada and Utah, New Mexico, Pennsylvania, Texas, Utah)
Total: 973 collections including 1677 occurrences