← Scenic Posters Iguanodon Dinosaur Poster Default Title - $11.90 USD $11.90 USD Quantity Add to Cart We're sorry, this product is sold out! Dispatched in 10 – 15 business days. Worldwide shipping available. Shipping calculated at checkout. 11.0" x 17.0" High-quality paper, vibrant colors Frame not included Iguanodons were one of the first dinosaurs that were described in detail. Their most distinctive feature is a strong bony spike on their front limbs that looks like a thumb. Why that spike evolved is still a mystery though. Maybe they used it as a weapon against predators or other Iguanodons. Maybe it was used to break into seeds and fruit or as a hold while collecting food in trees.