• ✓Wide, low body covered in rows of bony armor plates
• ✓Large bony club at the end of a stiff tail
• ✓Broad triangular head with short horns at the back corners, small beak
• ✓Short sturdy legs under the body, quadrupedal
• ✓Whole animal visible in side view
• ✓Scene matches the period and the fossil site
• ✓No text, people or modern objects

Checked by Claude Opus 5.5 (checked item by item from the image) on Oct 28, 2026. The score is the share of checklist items the image gets right; it is not an expert scientific review.

Prompt used to create the image

Scientifically accurate paleoart of Ankylosaurus, a herbivore Ankylosauridae dinosaur from the late Maastrichtian, at the very end of the Cretaceous (about 68–66 million years ago). A very wide, low body covered on top in rows of flat and keeled bony plates (osteoderms). A large, heavy bony club at the end of a stiff tail. Reference: Ankylosaurus is a genus of armored dinosaur. Its fossils have been found in geological formations dating to the very end of the Cretaceous Period, about 70-66 million years ago, in western North America, making it among the last of the non-avian dinosaurs. It was named by Barnum Brown in 1908; it is monotypic, containing only A. magniventris. Anatomy: a broad triangular head with short pyramid-shaped horns pointing backward and sideways from the back corners, small beak; short, sturdy legs held under the body, walking on four legs. Full body in side view, whole animal visible, standing in a humid latest-Cretaceous floodplain forest like the Hell Creek Formation of North America, with conifers, ferns and early flowering trees and shrubs, no grass. Natural history museum illustration style, realistic textures and natural daylight, muted natural colors. No text, no labels, no humans, no modern objects.

Facts in the prompt come from Wikipedia (en) and Paleobiology Database