• ✓Extremely long neck, about half the body length
• ✓Quadrupedal on pillar legs, small head, tail off the ground
• ✓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 Uragasaurus, a herbivore Mamenchisauridae dinosaur from Tithonian–Berriasian times (149.2–137.05 million years ago). An extremely long neck making up about half of the whole body length, held roughly horizontal to moderately raised. Reference: Uragasaurus is an extinct genus of mamenchisaurid sauropod dinosaur known from the Late Jurassic Phu Kradung Formation of Thailand. The genus contains a single species, Uragasaurus kalasinensis, known from a single dorsal (trunk) vertebra. It is the first member of the family Mamenchisauridae named from Thailand. Anatomy: quadrupedal on pillar-like legs, small head, tail held off the ground. Full body in side view, whole animal visible, standing in a Late Jurassic river floodplain like the Phu Kradung Formation of northeastern Thailand, with conifers, cycads, tree ferns and ferns, no grass and no flowering plants. 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