Trilobita - Corynexochida - Oryctocephalidae
Parent taxon: Corynexochina according to J. M. Adrain 2011
See also Palmer and Halley 1979, Sundberg 1994, Sundberg 2006, Sundberg and McCollum 1997, Sundberg and McCollum 2003, Sundberg and McCollum 2003 and Whittington et al. 1997
Sister taxa: Chengkouiidae, Corynexochidae, Dinesidae, Dorypygidae, Edelsteinaspididae, Jakutidae, Zacanthoididae
Subtaxa: Arthricocephalus Balangia Barklyella Changaspis Cheiruroides Cheiruroididae Curvoryctocephalus Duyunaspis Euarthricocephalus Feilongshania Hunanocephalus Kunshanaspis Lancastria Metabalangia Metarthricocephalus Opsiosoryctocephalus Oryctocara Oryctocare Oryctocarinae Oryctocephalina Oryctocephalinae Oryctocephaloides Oryctocephalops Paleooryctocephalus Protoryctocephalus Sandoveria Shabaella Shergoldiella Thoracocare Tonkinellinae
Ecology: nektobenthic carnivore
Distribution:
• Amgan of Kazakhstan (4 collections), the Russian Federation (6)
• Solvan of Australia (1), Canada (7: British Columbia, Newfoundland and Labrador), the Russian Federation (2), United States (1: Nevada)
• Delamaran of Canada (8: British Columbia), Mexico (1), Morocco (11), United States (76: California, California-Nevada, Idaho, Nevada, Nevada and California, Pennsylvania, Utah)
• Cambrian of Antarctica (1), Argentina (2), Australia (1), Canada (4: Alberta-British Columbia, British Columbia, Northwest Territories), China (83), Greenland (6), India (5), Kazakhstan (2), the Russian Federation (3), Spain (2), United States (28: Idaho, Montana, Nevada, Pennsylvania, Utah)
Total: 254 collections including 414 occurrences