Trilobita - Ptychopariida - Bolaspididae
Parent taxon: Ptychopariida according to H. B. Whittington et al. 1997
See also Adrain 2011
Sister taxa: Acrocephalitidae, Alokistocaridae, Amphorella, Atratebiinae, Bifodina, Bulnibarbi, Bvalbardites, Catillicephalidae, Chondrastaulina, Chuangiformis, Cliffiidae, Conococheaquea, Conocoryphidae, Conokephalinidae, Crepicephalidae, Diceratocephalidae, Elviniidae, Harpina, Indiligens, Kazelina, Kingstoniidae, Kirengelia, Lisaniidae, Lonchocephalidae, Lorenzellidae, Marjumiidae, Meniscocorphye, Meniscocoryphe, Menomoniidae, Neoanomocerella, Norwoodiidae, Olenina, Papyriaspididae, Phylacteridae, Plethopeltidae, Proasaphiscidae, Propeltura, Ptychopariidae, Ptychopariina, Ptychoparoides, Raymondinidae, Shumardiidae, Solenopleuracea, Solenopleuridae, Tricrepicephalidae, Xianquianaspis, Yuehsieszella
Subtaxa: Acrocephalops Bolaspidaspis Bolaspis Eldoradia Rawlinsella
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Cambrian of Canada (1: Newfoundland collection), the Russian Federation (2), United States (6: Arizona, Idaho/ Utah, Montana, Wyoming)
• Delamaran of United States (1: California)
Total: 10 collections including 11 occurrences