†family Dimeropygidae Hupe 1953 (trilobite)

Trilobita - Proetida - Dimeropygidae

Synonym: Toernquistiidae Hupé 1953

Parent taxon: Proetida according to R. A. Fortey and D. L. Bruton 2013

See also Adrain 2011, Adrain and Westrop 2007, Chatterton et al. 1998, Fortey and Droser 1999, Owens 2004 and Whittington et al. 1997

Sister taxa: Aulacopleuroidea, Bathyuridae, Bathyuroidea, Cammingella, Huanoproetus, Hystricuridae, Niachangella, Parapalebralia, Phaselops, Proetoidea, Pusillaboles, Radonia, Sperginaspis, Tayanaella, Tekinia, Telephinidae, Vitaella

Subtaxa: Bearriverops Chomatopyge Dimeropyge Dimeropygiella Heckethornia Ischyrotoma Mesotaphraspidinae Mesotaphraspis Pseudohystricurus Toernquistia Toernquistina Tulepyge

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Ecology: fast-moving low-level epifaunal deposit feeder

Distribution:

• Chazyan of Canada (9: Newfoundland and Labrador, Northwest Territories collections)

• Whiterockian of Canada (1: Newfoundland and Labrador), Norway (1), United States (16: Nevada, New York, Utah, Vermont)

• Arenig of Greenland (1), United States (1: New York)

• Arenigian of Canada (1: Northwest Territories)

• Ordovician of Argentina (19), Australia (3), Canada (42: Alberta, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Quebec), China (2), Ireland (2), Kazakhstan (2), Norway (10), the Russian Federation (1), the United Kingdom (15), United States (117: California, Colorado, Idaho, Missouri, Nevada, Oklahoma, Pennsylvania, Texas, Utah, Virginia)

• Tremadoc of Canada (4: Alberta)

• Ibexian of United States (1: Nevada)

• Skullrockian of United States (1: Utah)

Total: 249 collections including 289 occurrences

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