omeisaurus dinosaur pond

age animal arizona armor armored biped bipedal carboniferous china creature dinosaur epoch era evolution external extinct extinction fern genus grounddwelling herbivore illustration image jurassic lawleri lightlybuilt littleshielded lizard long nature neck omeisaurus organism ornithischian osteoderms paleontology period picture pine plates prehistoric primeval primitive reptile sauropod scutellosaurus silver small species tail themes thyreophora thyreophoran tianfuensis titanosaurus tree usa vertebrate wild wildlife