• ✓Bipedal, back horizontal, tail held straight out off the ground
• ✓Mouth closed, lips covering the teeth so none are visible
• ✓Palms facing each other, not turned down or dangling
• ✓Three weight-bearing toes on each foot
• ✓Short, broad skull with one thick rounded horn-like bump between the eyes, rough snout, no side horns
• ✓Tiny stubby arms, smaller than a T. rex's
• ✓Skin of small scales
• ✓About 6.5 m long
• ✕Long slender hind legs built for runningLegs not long and slender as the rule asks (Majungasaurus really had short, stocky legs; the rule needs fixing)
• ✓Whole animal visible in side view
• ✓Scene matches the period and the fossil site
• ✓No text, people or modern objects

Checked by Claude (AI) on Nov 3, 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 Majungasaurus, a carnivore Abelisauridae dinosaur from Maastrichtian times (72.2–66 million years ago). Bipedal with the back held roughly horizontal and the tail held straight out behind for balance, never dragging on the ground. NOT standing upright like a kangaroo. Mouth closed with all teeth fully hidden behind scaly lips, like a monitor lizard. NO visible teeth. Hands held tucked in near the chest with the palms facing inward toward each other, like clapping, claws curving inward and forward. NOT hanging down, NOT palms-down, NOT claws pointing at the ground. A short, broad skull with a single thick, rounded, horn-like bump on top of the head between the eyes, rough bony texture on the snout, NO side horns. Tiny, stubby, almost useless arms much smaller than a tyrannosaur's. Reference: Majungasaurus is a genus of abelisaurid theropod dinosaur that lived in Madagascar from 70 to 66 million years ago, at the end of the Cretaceous Period, making it one of the last-known, non-avian dinosaurs that went extinct during the Cretaceous–Paleogene extinction event. The genus contains a single species, Majungasaurus crenatissimus. This dinosaur was also called Majungatholus, which is considered a junior synonym of Majungasaurus. Anatomy: three main weight-bearing toes on each foot; skin of small scales; about 6.5 meters long; long, slender hind legs built for running. Full body in side view, whole animal visible, standing in a Late Cretaceous landscape with conifers, ferns and early flowering plants, no grass lawns. 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