Trilobita - Olenida - Olenidae
Parent taxon: Triarthrinae according to A. W. Owen 1981
See also Fortey 1974, Harrington and Leanza 1957, Jell and Adrain 2002, Nikolaisen 1965, Robison and Pantoja-Alor 1968 and Sepkoski 2002
Sister taxa: Plesioparabolina, Porterfieldia, Rampartaspis, Bienvillia
Subtaxa: Triarthrus becki Triarthrus beckii Triarthrus billingsi Triarthrus canadensis Triarthrus eatoni Triarthrus glaber Triarthrus huguesensis Triarthrus humilis Triarthrus jachalensis Triarthrus linnarssoni Triarthrus rougensis Triarthrus sichuansis Triarthrus skutensis Triarthrus spinosus Triarthrus turkestanicus
Type: Triarthrus beckii
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Uhaku of Norway (1 collection), Sweden (2)
• Chazyan of Canada (1: Northwest Territories)
• Arenigian of Argentina (4)
• Arenig of Argentina (2), Bolivia (1), China (1), Norway (2), Sweden (1), United States (1: Nevada)
• Ordovician of Argentina (12), Canada (20: Northwest Territories, Nunavut, Ontario, Quebec), China (3), New Zealand (1), Norway (3), the Russian Federation (1), Sweden (5), the United Kingdom (1), United States (48: Kentucky, Michigan, Nevada, New York, Ohio, Pennsylvania), Venezuela (1)
• Tremadoc of Argentina (2), Bolivia (3), China (2), France (2)
Total: 120 collections including 129 occurrences
Specimen images are retrieved through the ePANDDA API.
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