• ✓Bipedal, back horizontal, tail held straight out off the ground
• ✕Palms facing each other, not turned down or danglingHands held forward with claws pointing down, looking palms-down
• ✓Long, narrow crocodile-like snout, conical teeth, nostrils set back toward the eyesMouth closed, so teeth and nostril position are hard to see
• ✓Tall back sail formed by elongated neural spines
• ✓Deep, paddle-like tail finTail fin slightly lower than in the 2020 study
• ✓Robust arms with a large thumb claw, fairly short hind legs, broad flat feetFeet partly under water
• ✓Whole animal visible in side view
• ✓Scene matches the period and the fossil sitePalm-like trees may not have existed yet in the Cenomanian
• ✓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 Spinosaurus, a carnivore Spinosauridae dinosaur from the Cenomanian age of the Late Cretaceous (about 100–94 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. A long, narrow, crocodile-like snout with conical teeth and nostrils set far back near the eyes, NOT a deep tyrannosaur-like skull. A tall sail along the back formed by elongated neural spines covered in skin. Reference: Spinosaurus is a genus of large spinosaurid theropod dinosaurs that lived in what is now North Africa during the Cenomanian age of the Late Cretaceous period, about 100 to 94 million years ago. The genus was known first from Egyptian remains discovered in 1912 and described by German palaeontologist Ernst Stromer in 1915. The original remains were destroyed in World War II, but additional material came to light in the early 21st century. It is unclear whether one or two species are represented in the fossils reported in the scientific literature. Anatomy: hands held with palms facing each other (not pronated, not palms-down, not dangling); a deep, flexible, paddle-like tail with tall thin spines forming a fin, like a giant newt's tail; robust arms with a large curved thumb claw, relatively short hind legs with broad, flat feet. Full body in side view, whole animal visible, standing in shallow water at the edge of a wide Late Cretaceous river system in North Africa, like the Kem Kem beds of Morocco, with large fish in the water, ferns and conifers on the banks, 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