AMNH 5214 / AMNH 5895 skull cast
Ankylosaurus magniventris • “Fused lizard with great belly”
The living tank of the Late Cretaceous, armored in thick osteoderm plates with cranial horns and a massive distal tail club capable of shattering…
GPIT/RE/7288 mounted skeleton
Plateosaurus trossingensis • “Broad lizard of Trossingen”
One of the first large herbivorous dinosaurs, this bipedal prosauropod browsed tree ferns across Late Triassic Europe before the rise of giant sauropods.
Ankylosaurus magniventris lived during the Cretaceous, while Plateosaurus trossingensis inhabited the Triassic. They were separated by roughly 136 million years of deep time and never encountered one another in the ancient world. Both species shared a herbivore diet, occupying comparable trophic levels in their respective food webs. Plateosaurus trossingensis reached greater total length from snout to tail, but Ankylosaurus magniventris had a stockier, more robust build with higher estimated body mass.
Anatomical dimensions compared on a shared proportional baseline against an adult human (1.8 m / 5.9 ft).
Both dinosaurs reached nearly identical lengths.
Plateosaurus trossingensis stood taller by approximately 1.3 m.
Ankylosaurus magniventris had a greater estimated mass by 2 tonnes.
Plateosaurus trossingensis reached greater total length from snout to tail, but Ankylosaurus magniventris had a stockier, more robust build with higher estimated body mass.
Paleontological Note on Mass Estimates: Dinosaur body weights are derived through volumetric laser scanning and femoral circumference scaling equations. Because soft tissue does not fossilize directly, mass values carry statistical margins of uncertainty and represent scientific estimates rather than exact weights.
Direct answers to the most important comparative questions about how these two prehistoric species differed.
Plateosaurus trossingensis reached greater total length from snout to tail, but Ankylosaurus magniventris had a stockier, more robust build with higher estimated body mass.
Both species shared a herbivore diet, occupying comparable trophic levels in their respective food webs.
Ankylosaurus magniventris lived during the Cretaceous (Late Cretaceous, 68–66 Ma), while Plateosaurus trossingensis lived during the Triassic (Late Triassic, 214–204 Ma).
Fossils of Ankylosaurus magniventris were recovered from Montana, Wyoming, Alberta, whereas Plateosaurus trossingensis was discovered in Germany, Switzerland, France.
Ankylosaurus magniventris had a quadrupedal locomotion, contrasted with Plateosaurus trossingensis which had a bipedal stance.
Ankylosaurus magniventris and Plateosaurus trossingensis did NOT live at the same time. They were separated by an immense temporal gulf of approximately 136 million years. Plateosaurus trossingensis lived and went extinct tens of millions of years before Ankylosaurus magniventris ever evolved.
Side-by-side catalog of verified anatomical measurements and geological records.
| Scientific Parameter | A Ankylosaurus magniventris | B Plateosaurus trossingensis |
|---|---|---|
| Scientific Binomial | Ankylosaurus magniventris | Plateosaurus trossingensis |
| Name Meaning | “Fused lizard with great belly” | “Broad lizard of Trossingen” |
| Taxonomic Clade / Group | Ankylosaurs | Sauropods |
| Geological Period | Cretaceous | Triassic |
| Fossil Time Range | Late Cretaceous, 68–66 Ma | Late Triassic, 214–204 Ma |
| Diet & Trophic Guild | Herbivore | Herbivore |
| Maximum Length | 8 m (26.2 ft) | 8 m (26.2 ft) |
| Standing / Hip Height | 1.7 m (5.6 ft) | 3 m (9.8 ft) |
| Estimated Body Mass | 6 tonnes (6,000 kg) | 4 tonnes (4,000 kg) |
| Locomotion / Stance | Quadrupedal | Bipedal |
| Geographic Localities | Montana, Wyoming, Alberta | Germany, Switzerland, France |
| Geological Formation | Hell Creek & Scollard Formations | Löwenstein & Trossingen Formations |
| Discovery History | Historical holotype | Historical holotype |
Visualizing both species across the 186-million-year span of the Mesozoic Era.
Ankylosaurus magniventris and Plateosaurus trossingensis did NOT live at the same time. They were separated by an immense temporal gulf of approximately 136 million years. Plateosaurus trossingensis lived and went extinct tens of millions of years before Ankylosaurus magniventris ever evolved.
Deep-time perspective: Ankylosaurus magniventris and Plateosaurus trossingensis were separated by approximately 136 million years. A visitor encountering one would have had no concept of the other.
Comparing the rock strata, paleoclimates, and ancient landscapes where their fossils were entombed.
Montana, Wyoming, Alberta
North America
Germany, Switzerland, France
Europe
Stratigraphic Synthesis:
Direct comparisons between extinct animals are inherently shaped by the incomplete nature of the fossil record. Skeletal dimensions reflect holotype or well-preserved paratype specimens, but individual ontogenetic age, sexual dimorphism, and intraspecific variation all influence the true living size of any prehistoric animal.
Body mass estimates shown above represent calculated averages from published volumetric models and biomechanical limb scaling. As modern synchrotron imaging and 3D digital skeletal mounts advance, museum measurements are continually refined.