Trilobita - Proetida - Bathyuridae
Parent taxon: Proetida according to J. Loch and R. Ethington 2017
See also Adrain 2011, Fortey and Bruton 2013, Fortey and Droser 1999, Lamsdell and Selden 2015, Loch 2007 and Whittington et al. 1997
Sister taxa: Aulacopleuroidea, Bathyuroidea, Cammingella, Dimeropygidae, Huanoproetus, Hystricuridae, Niachangella, Parapalebralia, Phaselops, Proetoidea, Pusillaboles, Radonia, Sperginaspis, Tayanaella, Tekinia, Telephinidae, Vitaella
Subtaxa: Acidiphorus Aponileus Bathyurellinae Bathyurinae Bathyurus Eleutherocentrus Ermanella Gignopeltis Gladiatoria Madaraspis Psephosthenaspis Pseudoolenoides Raymondites Strigigenalis
Ecology: fast-moving low-level epifaunal deposit feeder
Distribution:
• Chazyan of Canada (16: Newfoundland and Labrador, Northwest Territories, Ontario, Quebec collections), United States (7: New York, Utah)
• Whiterockian of Canada (57: Newfoundland and Labrador, Northwest Territories, Quebec), Norway (1), United States (74: Nevada, New York, Oklahoma, Utah)
• Arenigian of Canada (2: Northwest Territories), United States (5: Nevada, Utah)
• Arenig of Argentina (1), Canada (3: Newfoundland and Labrador), Greenland (7), the Russian Federation (1), United States (4: New York, North Dakota, Vermont)
• Canadian of Canada (4: Newfoundland, Newfoundland and Labrador, Northwest Territories, Québec), China (1)
• Ordovician of Canada (94: Alberta, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Ontario, Quebec), China (1), Greenland (9), Iran (1), Ireland (1), Norway (8), the Russian Federation (8), the United Kingdom (1), United States (427: California, Georgia, Idaho, Illinois, Iowa, Iowa/Wisconsin, Kentucky, Minnesota, Missouri, Montana, Nevada, New York, Oklahoma, Tennessee, Texas, Utah, Vermont, Virginia)
• Tremadoc of Argentina (1), Canada (15: Alberta), China (6)
• Ibexian of Canada (4: Quebec), Norway (1), United States (4: Nevada, New York)
• Skullrockian of Canada (7: Newfoundland, Newfoundland and Labrador)
Total: 771 collections including 1488 occurrences