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2012 ambiguous_gender blood bodily_fluids bone_frill ceratopsian ceratopsid chasmosaurine dinosaur duo feral fight frill_(anatomy)hi_res horn marginocephalian monochrome ornithischian outside prehistoric_species reptile saurischian scalie tail tailbutt theropod tiny_arms triceratops tyrannosaurid tyrannosauroid tyrannosaurus tyrannosaurus_rex unknown_artist