Trilobita - Corynexochida - Oryctocephalidae
Parent taxon: Oryctocephalidae according to F. A. Sundberg 2006
See also Sundberg 1994, Sundberg and McCollum 1997 and Sundberg and McCollum 2003
Sister taxa: Arthricocephalus, Balangia, Barklyella, Changaspis, Cheiruroides, Cheiruroididae, Curvoryctocephalus, Duyunaspis, Euarthricocephalus, Feilongshania, Hunanocephalus, Kunshanaspis, Lancastria, Metabalangia, Metarthricocephalus, Opsiosoryctocephalus, Oryctocara, Oryctocare, Oryctocarinae, Oryctocephalina, Oryctocephaloides, Oryctocephalops, Paleooryctocephalus, Protoryctocephalus, Sandoveria, Shabaella, Shergoldiella, Thoracocare, Tonkinellinae
Subtaxa: Oryctocephalites Oryctocephalus Tonkinella
Type: Oryctocephalus
Ecology: nektobenthic carnivore
Distribution:
• Cambrian of Argentina (2 collections), Australia (2), Canada (4: Alberta-British Columbia, British Columbia, Northwest Territories), China (40), India (5), Kazakhstan (1), Mexico (1), Spain (2), United States (23: Idaho, Montana, Nevada, Utah)
• Amgan of Kazakhstan (4), the Russian Federation (5)
• Solvan of Australia (1), Canada (7: British Columbia, Newfoundland and Labrador), the Russian Federation (1), United States (1: Nevada)
• Delamaran of Canada (9: British Columbia), Mexico (1), United States (72: California, Idaho, Nevada, Nevada and California, Pennsylvania, Utah)
Total: 181 collections including 227 occurrences