AI imageNote: This dinosaur is known from only part of a skeleton. The image fills in the missing parts from close relatives, so the real animal may have looked quite different.
Match with prompt
80% (4/5 items)
Where the image differs from the prompt
- Tail tip droops almost to the groundShould be: Tail held off the ground
See the checklist, prompt and sources
- ✓Early sauropod, quadrupedal, moderately long neck, smaller and lighter than later sauropods
- ✕Tail held off the groundTail tip droops almost to the ground
- ✓Whole animal visible in side view
- ✓Scene matches the period and the fossil siteSome low grass-like plants on the ground
- ✓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 Isanosaurus, a herbivore EarlySauropoda dinosaur from the Early Jurassic, Sinemurian–Pliensbachian (about 195–185 million years ago). An early sauropod, quadrupedal on pillar-like legs, with a moderately long neck, smaller and more lightly built than later sauropods. Reference: Isanosaurus is an extinct genus of sauropod dinosaur from the Early Jurassic in Thailand. Isanosaurus was originally thought to have lived during the Late Triassic, which would make it one of the oldest known sauropods, but other authors questioned this age estimate, suggesting that the genus lived during the Jurassic period. In 2026, U-Pb zircon dating confidently supported that the rock layers bearing the fossils of Isanosaurus were deposited during the Sinemurian-Pliensbachian stage of the Early Jurassic. Anatomy: a tail held off the ground. Full body in side view, whole animal visible, standing in an Early Jurassic river floodplain in northeastern Thailand (Nam Phong Formation), with conifers, cycads 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
Isanosaurus
There is no write-up for this dinosaur yet, but the scientific data below is complete.
Scientific details
- Classification
- Sauropodomorph (long-necked)
- Family
- Unknown
- When it lived
- 174.7–192.9 million years ago
- Geologic stages
- Pliensbachian – Toarcian
- Named by
- Buffetaut et al., 2000
- Fossil occurrences
- 1 sites
🦴 Known fossil material
Parts found as fossils
- Neck vertebrae
- Back vertebrae
- Tail vertebrae
- Ribs
- Shoulder girdle and chest
- Hind leg
Holotype: a partial skeleton without a skull, with a neck vertebra, one and a half back vertebrae, six tail vertebrae, two chevrons (under the tail), pieces of ribs, a shoulder blade, a sternal plate and a thigh bone.
Coloured areas are parts of the skeleton with fossil bones found so far (sometimes just one bone in that area); faint areas have not been found. The outline is a general shape for its group, not this dinosaur's real body.
Compiled from published descriptions; not yet checked against the original papers by a specialist. Sources: Wikipedia (en): Isanosaurus
Countries with fossils
- Thailand
Data from Paleobiology Database and Wikidata