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4:3 alien ambiguous_gender armor avalanche bone_frill brachiosaurid brachiosaurus ceratopsian ceratopsid chasmosaurine dimetrodon dino-riders dinosaur dromaeosaurid ezra_tucker female feral frill_(anatomy)group hadrosaurid laser macronarian male marginocephalian ornithischian ornithopod pachycephalosaurid pachycephalosaurus pelycosaur prehistoric_species pteranodon pteranodontid pterosaur quadruped ranged_weapon raygun reptile saurischian sauropod sauropodomorph scalie science_fiction shaking_fist spacesuit sphenacodontid stegosaurian stegosaurus synapsid tail theropod thyreophoran triceratops tyrannosaurid tyrannosauroid tyrannosaurus tyrannosaurus_rex velociraptor volcano weapon