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abs ankylosaurian ankylosaurid ankylosaurus anthro balls_outline biceps big_muscles big_penis biped bulge clothed clothing detailed_bulge dinosaur erection extreme_dinosaurs genital_outline genitals glaciersnow grin hardrock horn humanoid_genitalia humanoid_penis male monochrome muscular muscular_anthro muscular_male nipples nude ornithischian pecs penis prehistoric_species presenting reptile scalie sketch skimpy smile solo speedo spikes standing swimwear tail thyreophoran undressing