Trilobita - Ptychopariida - Raymondinidae
Parent taxon: Ptychopariida according to H. B. Whittington et al. 1997
See also Adrain 2011
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, Ptychopariidae, Ptychopariina, Ptychoparoides, Shumardiidae, Solenopleuracea, Solenopleuridae, Tricrepicephalidae, Xianquianaspis, Yuehsieszella
Subtaxa: Celmidae Celmus Glaphurella Glaphuridae Glaphurus Raymondina Varanella
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Chazyan of Canada (3: Newfoundland and Labrador, Quebec collections), United States (7: New York)
• Whiterockian of Canada (4: Newfoundland and Labrador, Quebec), United States (13: Nevada, New York, Vermont)
• Langevoja of Sweden (3)
• Hunderum of Sweden (1)
• Arenig of Canada (2: Newfoundland and Labrador), Sweden (1)
• Ordovician of Canada (2: Newfoundland, Newfoundland and Labrador), China (5), Ireland (1), Kazakhstan (1), the Russian Federation (6), the United Kingdom (2), United States (1: New York)
• Tremadoc of the Russian Federation (5)
• Cambrian to Ordovician of the Russian Federation (1)
• Cambrian of Canada (10: Alberta, Newfoundland and Labrador, Quebec), the Russian Federation (2)
Total: 70 collections including 83 occurrences