Artiopoda - Asaphida - Asaphidae
Parent taxon: Asaphidae according to O. A. Hoel 1999
See also Corbacho 2014, Harrington et al. 1959, Loch 2007, Neuman and Bruton 1974 and Owen 1981
Sister taxa: Anataphrus, Asaphellus, Asaphinae, Atopasaphus, Aulacoparia, Australopyge, Basilicus, Bellefontia, Birmanites, Bohemopyge, Borogothus, Brachyaspis, Branisaspis, Burminresia, Delphasaphus, Desmus, Ectenaspis, Ekeraspis, Emanuelaspis, Eoasaphus, Eoisotelus, Fuyunia, Gerasaphes, Gogiura, Griphasaphus, Guohongjunia, Hoekaspis, Homalopyge, Hunnebergia, Isabelinia, Isyrakopeltis, Kainisiliellina, Kayseraspis, Klabavia, Kobayashia, Lachnostoma, Lisogorites, Lycophron, Metaptychopyge, Metayuepingia, Nahannia, Neoasaphus, Neopeltis, Nerudaspis, Nileoides, Ningkianites, Niobides, Niobina, Niobinae, Nobiliasaphinae, Nobiliasaphus, Norasaphus, Norinia, Notopeltis, Ogmasaphus, Ogygiinae, Ogyginus, Ogygiocaridinae, Ogygiocarinae, Ogygiocaris, Ogygites, Ogygitoides, Onchometopus, Parabellefontia, Paramegalaspis, Paratamdaspis, Penchiopsis, Plectasaphus, Popovkiaspis, Presbynileus, Priceaspis, Proasaphus, Promegalaspidinae, Proscharyia, Protopresbynileus, Protoptychopyge, Pseudasaphus, Pseudoasaphus, Pseudogriphasaphus, Pseudogygites, Pseudoptyocephalus, Psilocephalina, Ptychopyge, Ptychopyginae, Ptyocephalus, Sanbernardaspis, Stegnopsis, Stenorhachis, Subasaphus, Suriaspis, Tchukeraspis, Thysanopyge, Trigonocerca, Trigonocercella, Valdaites, Vogdesia, Xenasaphus, Xenostegium, Zhenganites, Zuninaspis
Subtaxa: Golasaphus Isoteloides Isotelus Kierarges Megalaspides Megistaspis
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Silurian of United States (1: Georgia collection)
• Chazyan of Canada (18: Northwest Territories, Ontario, Quebec), United States (57: New York, Tennessee, Vermont)
• Whiterockian of Canada (16: Northwest Territories, Quebec), United States (20: Nevada, New York, Oklahoma, Vermont)
• Valaste of Sweden (1)
• Hunderum of Sweden (1)
• Langevoja of Sweden (8)
• Billingen of Estonia (7), Norway (1), the Russian Federation (10), Sweden (17)
• Arenig of Argentina (2), Bolivia (1), China (54), France (2), Norway (1), Sweden (5), United States (3: New York, Vermont)
• Arenigian of Argentina (5), China (3), United States (2: Utah)
• Dawan of China (5)
• Ordovician of Argentina (2), Australia (3), Belarus (1), Canada (97: Alberta, Manitoba, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Nunvait, Ontario, Quebec, Québec), China (10), Colombia (1), Estonia (1), France (2), Iran (3), Kazakhstan (1), Latvia (2), Lithuania (1), Morocco (2), Norway (42), the Russian Federation (53), Spain (1), Sweden (70), the United Kingdom (12), United States (922: California, Georgia, Illinois, Illinois, Iowa, Indiana, Iowa, Iowa/Wisconsin, Kentucky, Maryland, Michigan, Minnesota, Missouri, Montana, Nevada, New York, Ohio, Oklahoma, Pennsylvania, Pennsylvania and Virginia, Tennessee, Utah, Virginia, Wisconsin)
• Canadian of Canada (2: Newfoundland, Newfoundland and Labrador)
• Ibexian of United States (2: Nevada)
• Skullrockian of Canada (1: Newfoundland)
• Cambrian of Australia (8)
Total: 1479 collections including 1631 occurrences