Trilobita - Ptychopariida - Lonchocephalidae
Parent taxon: Ptychopariida according to H. B. Whittington et al. 1997
See also Adrain 2011 and Jell and Adrain 2002
Sister taxa: Acrocephalitidae, Alokistocaridae, Amphorella, Atratebiinae, Bifodina, Bolaspididae, Bulnibarbi, Bvalbardites, Catillicephalidae, Chondrastaulina, Chuangiformis, Cliffiidae, Conococheaquea, Conocoryphidae, Conokephalinidae, Crepicephalidae, Diceratocephalidae, Elviniidae, Harpina, Indiligens, Kazelina, Kingstoniidae, Kirengelia, Lisaniidae, Lorenzellidae, Marjumiidae, Meniscocorphye, Meniscocoryphe, Menomoniidae, Neoanomocerella, Norwoodiidae, Olenina, Papyriaspididae, Phylacteridae, Plethopeltidae, Proasaphiscidae, Propeltura, Ptychopariidae, Ptychopariina, Ptychoparoides, Raymondinidae, Shumardiidae, Solenopleuracea, Solenopleuridae, Tricrepicephalidae, Xianquianaspis, Yuehsieszella
Subtaxa: Amiaspis Bolaspidellus Calymenidius Caulaspina Caulaspis Durinia Glaphyraspis Hawkinsaspis Interalia Kuraspis Kuraspoides Lonchocephalus Monosulcatina Neoglaphyraspis Neograciella Nordia Olegaspis Pseudotalbotina Quebecaspis Raashellina Talbotina Terranovella Trymataspis Weeksina
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Chazyan of Canada (1: Newfoundland and Labrador collection)
• Tremadoc of Argentina (1)
• Taoyuanian of the Russian Federation (2)
• Delamaran of United States (1: Utah)
• Cambrian of Canada (32: Alberta, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Quebec, Yukon), China (11), Greenland (4), Kazakhstan (2), the Russian Federation (37), United States (81: Alaska, Montana, Nevada, New York, Pennsylvania, South Dakota, Texas, Utah, Vermont, Virginia, Wisconsin, Wyoming)
Total: 172 collections including 200 occurrences