A new ceratopsian taxon Xuanhuaceratops niei gen. et sp. nov. is erected based on four fragmentary specimens collected from the Late Jurassic Houcheng Formation, Hebei Province, China. Xuanhuaceratops shares a number of derived features with, and is closely related to, another probable Late Juarassic ceratopsian Chaoyangsaurus youngi, from which it differs in only possessing a single premaxillary tooth as well as in details of quadrate and scapular morphology. We hypothesize that these two taxa represent a primitive lineage of Ceratopsia that is basal to the psittacosaurid-neoceratopsian diversity, and propose the name Chaoyangsauridae for it.
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Great Plains Dinosaur Museum & Field Stn, Malta, MT 59538 USA
Dept Ecol & Evolutionary Biol, 405 N 1st Ave E, Malta, MT 59538 USA
Univ Toronto, Royal Ontario Museum, Toronto, ON, CanadaGreat Plains Dinosaur Museum & Field Stn, Malta, MT 59538 USA
Woodruff, D. Cary
Trexler, David
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Two Med Dinosaur Ctr, 120 2nd Ave S, Bynum, MT 59419 USAGreat Plains Dinosaur Museum & Field Stn, Malta, MT 59538 USA
Trexler, David
Maidment, Susannah C. R.
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Nat Hist Museum, Dept Earth Sci, Cromwell Rd, London SW7 5BD, EnglandGreat Plains Dinosaur Museum & Field Stn, Malta, MT 59538 USA