Trilobita - Ptychopariida - Ptychopariidae
Parent taxon: Ptychopariida according to H. B. Whittington et al. 1997
See also Adrain 2011, Hughes et al. 2002, Kruse 1990, Landing et al. 2008 and Pour and Popov 2009
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, Lonchocephalidae, Lorenzellidae, Marjumiidae, Meniscocorphye, Menomoniidae, Neoanomocerella, Norwoodiidae, Olenina, Papyriaspididae, Phylacteridae, Plethopeltidae, Proasaphiscidae, Propeltura, Ptychopariina, Ptychoparoides, Raymondinidae, Shumardiidae, Solenopleuracea, Solenopleuridae, Tricrepicephalidae, Xianquianaspis, Yuehsieszella
Subtaxa: Achlysopsis Altikolia Altitudella Amecephalites Asthenopsis Austinvillia Balangcunaspis Bathyholcus Bathyocos Billingsaspis Binodaspis Bolaspidina Braintreella Brunswickia Caborcella Cathayanella Champlainia Chengshanaspis Conopolus Deltina Douposiella Entsyna Eokaotaia Eoptychoparia Eospencia Eurostina Gaotanaspis Gaphuraspis Gedongaspis Gunnia Holasaphus Illtydaspis Jangudaspis Jiagouia Jialaopsis Jianchangia Jiumenia Kaotaia Kochiella Kochiellina Kounamkites Kunmingaspis Laminurus Laoyingshania Luxella Lyriaspis Meitania Meniscopsia Monanocephalus Mufushania Nangaoia Nangaops Nassovia Neoblairella Neoregina Olenekina Onchocephalites Orienturus Orlovia Orloviella Pachyaspis Paleonelsonia Palmerara Palmeraspis Panacus Paraeosoptychoparia Parahiolites Paraperiomma Paraplagiura Parapoulsenia Paraziboaspis Periommella Piaziella Pingluaspis Piochella Plagiura Plesiamecephalus Poulsenella Poulsenia Probowmania Probowmaniella Probowmanops Proliostracus Protohedinia Psilostracus Ptychoparella Ptychopariinae Qiaotouaspis Regius Salankanaspis Sanwania Semisphaerocephalus Shantungaspis Shuiyuella Sinoptychoparia Spencella Spencia Stoecklinia Suluktella Syspacephalus redpathi Syspacephalus unca Townleyella Trigonyangaspis Tukalandaspis Ulrichaspis Variopelta Vermontella Volocephalina Wanhuaia Weijiaspis Wuhaina Xingrenaspis Yaojiayuella Yohoaspis Ziboaspidella Ziboaspis
Type: Ptychoparella
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Tremadoc of Canada (1: Newfoundland and Labrador collection)
• Taoyuanian of the Russian Federation (1)
• Amgan of the Czech Republic (2), Norway (1), the Russian Federation (3), United States (2: Utah)
• Solvan of Canada (31: British Columbia, Newfoundland and Labrador), the Czech Republic (6), Kazakhstan (1), United States (49: Nevada, Pennsylvania)
• Delamaran of Canada (28: Alberta, British Columbia, Northwest Territories), Mexico (2), Morocco (2), United States (112: California, California-Nevada, Idaho, Montana, Nevada, Nevada and California, Pennsylvania, Utah, Vermont, Virginia)
• Cambrian of Antarctica (5), Argentina (1), Australia (15), Canada (39: Alberta, Alberta-British Columbia, Brithish Columbia, British Columbia, Newfoundland, Newfoundland and Labrador, Northwest Territories, Quebec, Yukon, Yukon Territory), China (144), the Czech Republic (6), Greenland (12), India (23), Kazakhstan (4), Kyrgyzstan (1), the Russian Federation (18), South Korea (3), Spain (1), the United Kingdom (1), United States (106: Alaska, Arizona, California, Georgia, Idaho, Massachusetts, Montana, Nevada, New York, Pennsylvania, Utah, Vermont, Virginia)
• Waucoban of Canada (1: British Columbia), Greenland (1)
Total: 622 collections including 1044 occurrences