Trilobita - Proetida - Brachymetopidae
Parent taxon: Aulacopleuroidea according to J. C. Lamsdell and P. A. Selden 2015
See also Adrain 2011, Adrain and Kloc 1997, Brezinski 1998, Owens 2003 and Owens and Hammann 1990
Sister taxa: Aulacopleuridae, Otarionidae
Subtaxa: Australosutura Brachymetopinae Cheiropyge Cordania Hahnus Latecephalus Mystrocephala Narinia
Ecology: fast-moving low-level epifaunal deposit feeder
Distribution:
• Permian of China (2 collections), Indonesia (1), Japan (2), the Russian Federation (1), Thailand (1), Ukraine (1), United States (3: Alaska, Texas)
• Namurian of Australia (1)
• Carboniferous of Australia (10), Belgium (9), China (3), France (3), Germany (5), Ireland (2), Slovenia (3), Spain (3), Ukraine (1), the United Kingdom (15), United States (37: Alaska, Iowa, Kentucky, Missouri, New Mexico, Ohio, Tennessee, Texas)
• Devonian of Canada (3: Ontario, Quebec), China (1), Colombia (1), Germany (6), Italy (1), United States (9: Illinois, Indiana, Iowa, Missouri, Oklahoma, Pennsylvania)
• Silurian to Devonian of United States (1: Oklahoma)
• Silurian of Canada (1: Northwest Territories), the Czech Republic (2), the United Kingdom (1), United States (3: Arkansas, New York)
• Whiterockian of Norway (1)
• Ordovician of Portugal (2), Spain (4)
Total: 139 collections including 166 occurrences