Artiopoda - Ptychopariida - Catillicephalidae
Parent taxon: Ptychopariida according to H. B. Whittington et al. 1997
See also Adrain 2011 and Bentley et al. 2006
Sister taxa: Acrocephalitidae, Alokistocaridae, Amphorella, Atratebiinae, Bifodina, Bolaspididae, Bulnibarbi, Bvalbardites, Chondrastaulina, Chuangiformis, Cliffiidae, Conococheaquea, Conocoryphidae, Conokephalinidae, Crepicephalidae, Diceratocephalidae, Elviniidae, Harpina, Indiligens, Jamrogiidae, Kazelina, Kingstoniidae, Kirengelia, Lisaniidae, Lonchocephalidae, Lorenzellidae, Marjumiidae, Meniscocorphye, Meniscocoryphe, Menomoniidae, Neoanomocerella, Nepeidae, Norwoodiidae, Olenina, Onchonotopsidae, Papyriaspididae, Phylacteridae, Plethopeltidae, Proasaphiscidae, Propeltura, Ptychopariidae, Ptychopariina, Ptychoparoides, Raymondinidae, Shumardiidae, Solenopleuracea, Solenopleuridae, Tricrepicephalidae, Xianquianaspis, Yuehsieszella
Subtaxa: Acheilops Agelagma Buttsia Calculites Catillicephala Catillicephalina Distazeris Galeaspis Lajishanaspis Madarocephalus Matania Onchonotellus Onchonotininae Onchonotopsis Onchonotus Pemphigaspis Peracheilus Theodenisia Theodensia Triarthropsis Tumidulaspis Tuojiangella Urbanaspis Welleraspis Yukonaspis
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Ordovician of Argentina (1 collection), Canada (6: Newfoundland, Newfoundland and Labrador, Yukon), Norway (1), the United Kingdom (1)
• Skullrockian of United States (1: Texas)
• Taoyuanian of China (8), the Russian Federation (3)
• Cambrian of Antarctica (8), Australia (4), Canada (54: Alberta, Newfoundland, Newfoundland and Labrador, Quebec, Yukon), China (40), Greenland (13), Kazakhstan (29), New Zealand (1), the Russian Federation (9), South Korea (3), United States (77: Alaska, Arkansas, Missouri, Nevada, New York, Oklahoma, Pennsylvania, South Dakota, Texas, Utah, Vermont, Virginia, Wisconsin, Wyoming)
Total: 259 collections including 373 occurrences