• ✓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
• ✓Tall, narrow, pointed hump in front of the hips, from two very tall vertebral spines
• ✓Long, low, narrow skull, not broad and deep like T. rex
• ✓About 5.5 m long, short three-fingered arms, small scales
• ✓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 Concavenator, a carnivore Carcharodontosauridae dinosaur from Barremian times (125.77–121.4 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 tall, narrow, pointed hump on the back just in front of the hips, formed by two very tall vertebral spines. A long, low, narrow skull with blade-like teeth, NOT the broad deep skull of Tyrannosaurus. Reference: Concavenator is a genus of carcharodontosaurid dinosaur that lived in Spain during the Early Cretaceous epoch, about 125 million years ago. The genus contains a single species, Concavenator corcovatus, named and described in 2010 from a nearly complete skeleton collected from the Las Hoyas fossil site of the La Huérguina Formation. Anatomy: three main weight-bearing toes on each foot; an animal about 5.5 meters long, short arms with three clawed fingers, powerful hind legs, skin of small scales. Full body in side view, whole animal visible, standing in an Early Cretaceous subtropical wetland in central Spain, like Las Hoyas, with conifers, ferns and shallow pools, 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