Trilobita - Phacopida - Cheiruridae
Alternative spelling: Pilekiidae
Parent taxon: Cheiruridae according to F. Perez-Peris et al. 2021
See also Adrain 2011, Edgecombe et al. 1999, Fortey and Bruton 2013 and Whittington et al. 1997
Sister taxa: Acanthoparyphinae, Actinopeltis, Anasobella, Ancyginaspis, Arcticeraurinella, Areia, Areiaspis, Borealaspis, Bornholmaspis, Ceraurinium, Cerauromeros, Cerauropeltis, Ceraurus, Chacomurus, Cheirurinae, Cheirurus, Chiozoon, Contracheirurus, Crotalocephalides, Crotalocephalina, Crotalocephalus, Cyrtometopinae, Cyrtometopus, Deiphon, Deiphoninae, Didrepanon, Eccoptochilinae, Forteyops, Foulonia, Gabriceraurus, Hammannopyge, Hapsiceraurus, Heliomera, Heliomeroides, Hemisphaerocoryphe, Holia, Holotrachelus, Hyrokybe, Junggarella, Kawina, Kolymella, Krattaspis, Ktenoura, Laneites, Lehua, Onycopyge, Osekaspis, Parayoungia, Parisoceraurus, Pateraspis, Patomaspis, Placoparina, Pompeckia, Proromma, Protocerauroides, Pseudocheirurus, Radiurus, Ratinkaspis, Reraspis, Sphaerexochinae, Sphaexerochinae, Stubblefieldia, Sycophantia, Turantyx, Valongia, Whittakerites, Xylabion, Xystocrania, Youngia, Zazvorkaspis, Kinderlania
Subtaxa: Anacheirurus Chashania Courtessolium Demeterops Emsurina Eocheirurus Koraipsis Landyia Macrogrammus Metapilekia Metapliomerops Parapilekia Pilekia Pliomeroides Pseudopliomera Seisonia Sinoparapilekia Sinoparapilekiini Tesselacauda Tienshihfuia Victorispina Yinaspis
Distribution:
• Whiterockian of Argentina (1 collection), Norway (1)
• Arenig of Argentina (1), Canada (1: Newfoundland and Labrador), China (1), Spain (1), the United Kingdom (1)
• Ordovician of Argentina (5), Australia (9), Canada (4: Alberta, Newfoundland, Northwest Territories), the Czech Republic (1), France (1), Iran (2), Morocco (1), Norway (2), the United Kingdom (1), United States (16: Idaho, Nevada, Utah)
• Tremadoc of Argentina (4), Canada (3: Alberta, Newfoundland and Labrador), China (3), the Czech Republic (4), Iran (1), Morocco (1), North Korea (1), Spain (3), Sweden (1), United States (1: Vermont)
• Cressagian of the United Kingdom (1)
• Cambrian to Ordovician of the Russian Federation (1)
• Cambrian of Argentina (1)
Total: 74 collections including 88 occurrences