Mamenchisaurus - Deluxe 1:100 ScaleMamenchisaurus Deluxe 1: 100 Scale Dinosaur Model by CollectA Features Accurate Hand Painted Details for Collectors Mamenchisaurus was a herbivorous sauropod that lived 160 to 145 million years ago. Known for its super long neck which made up half the total body length, it may have reached between 22 m (72 ft) to 35 m (115 ft) in length. Uniquely, the CollectA Mamenchisaurus model incorporates a tail club suggested by unusual and fused vertebrae found