Trilobita - Phacopida - Cheiruridae
Synonym: Holotrachelidae Warburg 1925
Parent taxon: Cheirurina according to F. Perez-Peris et al. 2021
See also Adrain 2011, Edgecombe et al. 1999, Hansen 2005, Harrington and Leanza 1957, Lamsdell and Selden 2015, Nikolaisen 1961, Peters 2003, Phleger 1933 and Whittington et al. 1997
Sister taxa: Encrinuridae, Pliomeridae
Subtaxa: Acanthoparyphinae Actinopeltis Anasobella Ancyginaspis Arcticeraurinella Areia Areiaspis Borealaspis Bornholmaspis Ceraurinium Cerauromeros Cerauropeltis Ceraurus Chacomurus Cheirurinae Cheirurus Chiozoon Contracheirurus Crotalocephalides Cyrtometopinae Cyrtometopus Deiphon Deiphoninae Didrepanon Eccoptochilinae Forteyops Foulonia Gabriceraurus Hammannopyge Hapsiceraurus Heliomera Heliomeroides Hemisphaerocoryphe Holia Holotrachelus Hyrokybe Junggarella Kawina Kinderlania Kolymella Krattaspis Ktenoura Laneites Lehua Onycopyge Osekaspis Parayoungia Parisoceraurus Pateraspis Patomaspis Pilekiinae Placoparina Pompeckia Proromma Protocerauroides Pseudocheirurus Radiurus Ratinkaspis Reraspis Sphaerexochinae Sphaexerochinae Stubblefieldia Sycophantia Turantyx Valongia Whittakerites Xylabion Xystocrania Youngia Zazvorkaspis
Ecology: fast-moving low-level epifaunal carnivore