Trilobita - Phacopida - Encrinuridae
Parent taxon: Encrinuridae according to Z. Kielan-Jaworowska et al. 1991
See also Nikolaisen 1961, Owen 1981, Owen and Bruton 1980 and Owen and Harper 1982
Sister taxa: Aegrotocatellus, Alwynulus, Anapliomerella, Atractocybeloides, Avalanchurus, Balizoma, Batocara, Bevanopsis, Celtencrinurus, Curriella, Dayongia, Dindymeninae, Distyrax, Elsarella, Encrinurinae, Eodindymene, Langgonia, Lasaguaditas, Lyrapyge, Mackenziurus, Nucleurus, Paracybeloides, Parakailia, Perirehaedulus, Perryus, Plasiaspis, Prophysemataspis, Prostrix, Sinocybele, Staurocephalidae, Staurocephalinae, Stiktocybele, Struszia, Wallacia, Wuoaspis
Subtaxa: Atractopyge Cybele Cybellela Cybeloides Cybelurus Deacybele Miracybele Quinquecosta
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Uhaku of the Russian Federation (1 collection)
• Chazyan of Canada (16: Newfoundland and Labrador, Northwest Territories), United States (5: New York, Oklahoma)
• Whiterockian of Canada (8: Newfoundland and Labrador, Quebec), Norway (2), United States (12: California, Nevada, New York, Oklahoma)
• Volkhov of the Russian Federation (18)
• Arenig of Norway (1)
• Ordovician of Belgium (4), Canada (24: Newfoundland, Northwest Territories, Ontario, Quebec, Yukon), China (11), Estonia (4), Ireland (17), Norway (48), the Russian Federation (20), Sweden (16), the United Kingdom (50), United States (14: California, Iowa/Wisconsin, Nevada, Utah, Virginia)
Total: 271 collections including 310 occurrences