Trilobita - 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, Ectenaspis, Emanuelaspis, Eoasaphus, Eoisotelus, Fuyunia, Gerasaphes, Gogiura, Griphasaphus, Guohongjunia, Homalopyge, Hunnebergia, Isabelinia, Isyrakopeltis, Kainisiliellina, Kayseraspis, Klabavia, Kobayashia, Lachnostoma, Lisogorites, Lycophron, Metaptychopyge, Metayuepingia, Nahannia, Neopeltis, Nerudaspis, Nileoides, Ningkianites, Niobides, Niobina, Niobinae, Nobiliasaphinae, Nobiliasaphus, Norasaphus, Norinia, 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, Suriaspis, Tchukeraspis, Thysanopyge, Trigonocerca, Trigonocercella, Valdaites, Vogdesia, Xenasaphus, Xenostegium, Zhenganites, Zuninaspis
Subtaxa: Golasaphus Hoekaspis Isoteloides Isotelus Kierarges Megalaspides Megistaspis Notopeltis
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 (54: New York, Tennessee, Vermont)
• Whiterockian of Canada (16: Northwest Territories, Quebec), United States (20: Nevada, New York, Oklahoma, Vermont)
• Fennian of France (1)
• Volkhov of Argentina (1), Latvia (1), Norway (1), the Russian Federation (23), Sweden (28)
• Valaste of Sweden (1)
• Langevoja of Sweden (8)
• Hunderum of Sweden (1)
• Arenig of Argentina (2), Bolivia (6), China (54), France (3), Morocco (1), Norway (1), Sweden (5), United States (3: New York, Vermont)
• Dawan of China (5)
• Arenigian of Argentina (5), China (3), United States (2: Utah)
• Ordovician of Argentina (16), Australia (4), Belarus (1), Bolivia (3), Canada (90: British Columbia, Manitoba, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Nunvait, Ontario, Quebec, Québec), China (9), Estonia (8), France (2), Iran (3), Kazakhstan (1), Latvia (1), Lithuania (1), Morocco (2), Norway (43), the Russian Federation (40), Spain (1), Sweden (59), the United Kingdom (12), United States (925: 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)
• Tremadoc of Argentina (39), Bolivia (1), Canada (9: Alberta), China (1), Colombia (1), France (1)
• Ibexian of United States (2: Nevada)
• Skullrockian of Canada (1: Newfoundland)
• Cambrian of Australia (8)
Total: 1550 collections including 1710 occurrences