- Envision a lush prehistoric forest where Argentinosaurus peacefully feeds on towering conifers. Showcase the immense height of the dinosaur against the backdrop of ancient trees, with smaller dinosaurs and pterosaurs observing from the branches. description of the dinosaur Extremely long neck and tail, characteristic of sauropod dinosaurs. Huge body size, making it one of the largest land animals to ever exist. Column-like legs with elephantine feet to support its immense weight. Small head relative to body size, with peg-like teeth suitable for browsing on vegetation.