Labels:text | animal | bird OCR: JURASSIC (208-144 MYA) FOSSIL FINDS Mamen chisaurus, a long, four-legged plant-eater with a blunt snout, strong teeth, and the longest known neck of all dinosaurs. CRETACEOUS (144-65 MYA) FOSSIL FINDS Protoceratops, a four-legged plant-eater with a broad neck frill.