Artiopoda - Corynexochida - Cheilocephalidae
Parent taxon: Corynexochida according to H. B. Whittington et al. 1997
See also Adrain 2011 and Jell and Adrain 2002
Sister taxa: Brylyella, Chondagraulos, Corynexochidacea, Corynexochina, Corynexochoidea, Dolichometopidae, Granularapis, Granularaspidae, Hemibarrandiidae, Hunnanocephalus, Illaenidae, Illaenina, Illaenoidea, Leiostegiina, Phillipsinellidae, Styginidae, Xuigiella
Subtaxa: Aksayaspis Cheilocephalus Emsurella Eotaitzuia Lecanoaspis Macelloura Oligometopus Parakoldinia Pseudokingstonia Pseudokoldinia
Ecology: nektobenthic carnivore
Distribution:
• Ordovician of the Russian Federation (3 collections)
• Taoyuanian of China (1), the Russian Federation (2)
• Cambrian to Ordovician of the Russian Federation (1)
• Cambrian of Canada (6: Alberta, Newfoundland, Yukon), China (5), Kazakhstan (13), the Russian Federation (17), United States (75: Alaska, Arkansas, California, Indiana, Minnesota, Missouri, Montana, Nevada, Nevada and Utah, Pennsylvania, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Wyoming)
Total: 123 collections including 134 occurrences