Body length
InferredAbout 15 m (reconstruction reference)
The original reconstruction estimates this scale; no complete individual or proven adult species maximum is identified. [D1]
EXHIBIT 240
Ampelosaurus
Ampelosaurus atacis
Dinosaur
Ampelosaurus was a French titanosaur known from bones, teeth and several distinctive armor elements. [1]
TWO WAYS TO PICTURE THE PAST
Science & the silver screen
Compare the evidence with the familiar movie image. The illustrations are not to a shared scale.
01 / SOURCE-INFORMED RECONSTRUCTION
A life reconstruction from the evidence
Image unavailableIllustrative life reconstruction of Ampelosaurus in a period-appropriate environment; coloration and missing anatomy are interpretations.The exhibit and its credited image source remain available.
An illustrative reconstruction. Compare its anatomy with the evidence and limitations in the dossier. [1]
Source-informed reconstruction. Appearance evidence [1]. Original illustration; missing anatomy, coloration and scenery include interpretation.
Fossils constrain this life reconstruction. Missing anatomy, coloration and the environmental scene include interpretation; the dossier explains the evidence limits.
02 / MOVIE-STYLE INTERPRETATION
A cinematic imagination
Image unavailableIllustrative reconstruction of Ampelosaurus atacis; missing anatomy, pose, skin and colors are hypotheses.The exhibit and its credited image source remain available.
An illustrative reconstruction. Compare its anatomy with the evidence and limitations in the dossier. Lighting, coloration and scenery are artistic choices. This image does not document a fossil locality or behavior.
Original artwork · artistic interpretation.
Scientific view: source-informed reconstruction, credited paleoart or specimen-based imagery. Movie-style view: Original artistic interpretation. Reconstructions involve uncertainty.
PERIODLate Cretaceous[2]
DIETHerbivoreEvidence and uncertainty in the dossier
TOTAL LENGTH15–15 mEstimate scope matters
FOSSILS FOUNDFrance[1]
MEET THE ANIMAL
Meet Ampelosaurus
Ampelosaurus was a long-necked, four-legged plant eater from southern France. The museum directory gives a length reference of about fifteen meters, making it a substantial animal even among familiar dinosaur displays. That number is a reconstruction rather than a measured complete skeleton. Teeth, limb bones and other skeletal parts help identify a titanosaur, while illustrations must supply missing soft tissues and colors. [D3]
The original description named Ampelosaurus atacis from fossils in the Upper Aude Valley. Its type consists of three connected back vertebrae, with other material referred from the same fossil deposits. Several bony skin elements were also described. They support the presence of armor, but the fossils do not show exactly where every plate, knob or spine sat on a living animal. [D1]
Later researchers examined thin sections of its bones to investigate growth. They found changes in the organization of bone tissue that suggest growth slowed. Such evidence cannot by itself prove that the dinosaur became an island dwarf, and robust or slender bones do not automatically identify males and females. The study also leaves uncertainties because not every largest known bone was sampled. [D2]
PREHISTORIC ANIMAL DOSSIER
A life in profile.
The animal, the evidence, and the questions still open.
Bone sections show changes in growth tissue without establishing every individual's final size or sex. [D2]
Profile scope: Genus — French Ampelosaurus atacis; type C3-247 vertebrae and referred Upper Aude material. [D1]
- Time
- Late Cretaceous
- Fossil locations in this exhibit
- France
How to read the evidence
Source supported identifies a description documented by the cited source. Inferred marks a reconstruction or functional estimate. Debated marks competing interpretations. Not established means the sources reviewed for this dossier do not support a firm conclusion; it does not mean a behavior never occurred.
A size reference is an estimate, not a population range. Nesting evidence does not by itself establish courtship, mate choice, or lifelong pairing.
Body mass
Not establishedNot established here
The reviewed directory supplies no maturity-qualified numerical mass adopted here. [D3]
Diet and feeding
InferredPlant feeding inferred
Institutional classification and sauropod anatomy support herbivory; particular foods are not preserved. [D3]
Habitat and setting
InferredSouthern French terrestrial setting
Bellevue material studied histologically is Late Campanian–early Maastrichtian; fossils represent land animals rather than a marine habitat. [D2]
Movement
InferredQuadrupedal sauropod reconstruction
Four weight-bearing limbs support the body; movement speed is not measured. [D3]
Recognizable anatomy
Source supportedTitanosaur bones and osteoderms
Several bony armor elements are documented, but their arrangement on a living body is unknown. [D1]
Reproduction & life together
Reproduction and nesting
Not establishedNot established here
Reviewed bones do not identify a genus-specific egg or nest. [D1]
Mating and courtship
Not establishedNot established here
Robust and gracile bone forms do not prove sexes or mating displays. [D2]
Social behavior
Not establishedNot established here
A disarticulated fossil accumulation does not by itself demonstrate a living herd. [D1]
Dossier research & sources
Sources and inspection notes for the claims in this profile.
- Ampelosaurus atacis (nov. gen., nov. sp.), a new Titanosaurid from the Upper Cretaceous of the Upper Aude Valley (France) (Le Loeuff, 1995)Comptes Rendus de l’Académie des Sciences Paris321(IIa):693–699; Smithsonian English translation · Accessed 2026-10-06Full original institutional translation inspected. Type C3-247 three articulated middle dorsals; disarticulated Bellevue assemblage. Referred four varied osteoderms25–28cm, placement not preserved. Original reconstruction up to15m is not measured final adult maximum; French A.atacis not Spanish Ampelosaurus sp. material. · Inspected: page
- Modified Laminar Bone in Ampelosaurus atacis and Other Titanosaurs (Sauropoda): Implications for Life History and Physiology (Klein et al., 2012)PLOS ONE 7(5):e36907 · Accessed 2026-10-06Full original text retained and Bellevue specimen selection, histology/growth and discussion inspected. LateCampanian–earlyMaastrichtian French material; largest known bones not all sampled. Growth-tissue change does not alone establish dwarfism; robust/gracile forms not proven sexes. Uncertain Cruzy/Narbonne titanosaurs and Spanish specimens are not imported into A.atacis claims. · Inspected: page
- Ampelosaurus dinosaur directoryNatural History Museum, London · Accessed 2026-10-06Institutional directory inspected: France, herbivorous sauropod, teeth/postcrania/osteoderms, 15m educational reference and atacis spelling. Its numerical age interval is not pooled with the specific French histology locality age. · Inspected: page
THE STORY IN THE FOSSILS
Evidence behind Ampelosaurus
The reviewed bone sections record slower-growing tissue, but that does not alone prove island dwarfism or establish sexual differences. [2]
The museum's size reference introduces scale while the dossier identifies the limits of whole-body reconstruction. [3]
A note on scale and time
The dossier identifies the scope of each reference estimate. A mount, an individual fossil and a species-wide adult range are different measurements. Comparison metrics remain unavailable where adult scope has not been established. Unknown does not mean zero.
Sources & editorial notes
Sources support the stated claims and scopes. Refer to the evidence notes for uncertainty.
- Ampelosaurus atacis (nov. gen., nov. sp.), a new Titanosaurid from the Upper Cretaceous of the Upper Aude Valley (France) (Le Loeuff, 1995)Comptes Rendus de l’Académie des Sciences Paris321(IIa):693–699; Smithsonian English translation · Accessed 2026-10-06Full original institutional translation inspected. Type C3-247 three articulated middle dorsals; disarticulated Bellevue assemblage. Referred four varied osteoderms25–28cm, placement not preserved. Original reconstruction up to15m is not measured final adult maximum; French A.atacis not Spanish Ampelosaurus sp. material. · Inspected: page
- Modified Laminar Bone in Ampelosaurus atacis and Other Titanosaurs (Sauropoda): Implications for Life History and Physiology (Klein et al., 2012)PLOS ONE 7(5):e36907 · Accessed 2026-10-06Full original text retained and Bellevue specimen selection, histology/growth and discussion inspected. LateCampanian–earlyMaastrichtian French material; largest known bones not all sampled. Growth-tissue change does not alone establish dwarfism; robust/gracile forms not proven sexes. Uncertain Cruzy/Narbonne titanosaurs and Spanish specimens are not imported into A.atacis claims. · Inspected: page
- Ampelosaurus dinosaur directoryNatural History Museum, London · Accessed 2026-10-06Institutional directory inspected: France, herbivorous sauropod, teeth/postcrania/osteoderms, 15m educational reference and atacis spelling. Its numerical age interval is not pooled with the specific French histology locality age. · Inspected: page
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