NHMUK PV R36730 ("Sophie")
Stegosaurus stenops • “Roofed lizard with narrow face”
An iconic plated herbivore possessing alternating osteodermal dorsal plates for thermoregulation or display and four lethal tail spikes (thagomizer) for active defense.
MB.Av.100 ("Berlin Specimen" original fossil slab)
Archaeopteryx lithographica • “Ancient wing of lithographic stone”
The historic transitional fossil bridging non-avian feathered theropods and modern birds, possessing feathered wings alongside toothed jaws and a bony tail.
Stegosaurus stenops and Archaeopteryx lithographica were both Jurassic dinosaurs. Their known fossil horizons overlap by approximately 0.5 million years, confirming they coexisted on Earth during the same epoch. Stegosaurus stenops was an adapted herbivore, whereas Archaeopteryx lithographica was a carnivore, representing fundamentally distinct ecological roles. Based on available fossil estimates, Stegosaurus stenops was larger than Archaeopteryx lithographica in both overall length and estimated body mass (approximately 5000× heavier and 18× longer). Estimates vary between individual specimens.
Anatomical dimensions compared on a shared proportional baseline against an adult human (1.8 m / 5.9 ft).
Stegosaurus stenops was longer by approximately 8.5 m.
Stegosaurus stenops stood taller by approximately 3.7 m.
Stegosaurus stenops had a greater estimated mass by 5 tonnes.
Based on available fossil estimates, Stegosaurus stenops was larger than Archaeopteryx lithographica in both overall length and estimated body mass (approximately 5000× heavier and 18× longer). Estimates vary between individual specimens.
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.
Based on available fossil estimates, Stegosaurus stenops was larger than Archaeopteryx lithographica in both overall length and estimated body mass (approximately 5000× heavier and 18× longer). Estimates vary between individual specimens.
Stegosaurus stenops was an adapted herbivore, whereas Archaeopteryx lithographica was a carnivore, representing fundamentally distinct ecological roles.
Stegosaurus stenops lived during the Jurassic (Late Jurassic, 155–150 Ma), while Archaeopteryx lithographica lived during the Jurassic (Late Jurassic, 150–148 Ma).
Fossils of Stegosaurus stenops were recovered from Colorado, Utah, Wyoming, whereas Archaeopteryx lithographica was discovered in Solnhofen, Bavaria, Germany.
Stegosaurus stenops had a quadrupedal locomotion, contrasted with Archaeopteryx lithographica which had a bipedal / volant stance.
Their recorded fossil ranges overlap by approximately 0.5 million years (between 150 and 150 Ma). This demonstrates that Stegosaurus stenops and Archaeopteryx lithographica existed on Earth during the same geological epoch. However, chronological coexistence does not automatically prove they shared the exact same localized ecosystem, hunted one another, or directly interacted.
Side-by-side catalog of verified anatomical measurements and geological records.
| Scientific Parameter | A Stegosaurus stenops | B Archaeopteryx lithographica |
|---|---|---|
| Scientific Binomial | Stegosaurus stenops | Archaeopteryx lithographica |
| Name Meaning | “Roofed lizard with narrow face” | “Ancient wing of lithographic stone” |
| Taxonomic Clade / Group | Stegosaurs | Theropods |
| Geological Period | Jurassic | Jurassic |
| Fossil Time Range | Late Jurassic, 155–150 Ma | Late Jurassic, 150–148 Ma |
| Diet & Trophic Guild | Herbivore | Carnivore |
| Maximum Length | 9 m (29.5 ft) | 0.5 m (1.6 ft) |
| Standing / Hip Height | 4 m (13.1 ft) | 0.3 m (1 ft) |
| Estimated Body Mass | 5 tonnes (5,000 kg) | 0 tonnes (1 kg) |
| Locomotion / Stance | Quadrupedal | Bipedal / Volant |
| Geographic Localities | Colorado, Utah, Wyoming | Solnhofen, Bavaria, Germany |
| Geological Formation | Morrison Formation | Solnhofen Limestone |
| Discovery History | Historical holotype | Historical holotype |
Visualizing both species across the 186-million-year span of the Mesozoic Era.
Their recorded fossil ranges overlap by approximately 0.5 million years (between 150 and 150 Ma). This demonstrates that Stegosaurus stenops and Archaeopteryx lithographica existed on Earth during the same geological epoch. However, chronological coexistence does not automatically prove they shared the exact same localized ecosystem, hunted one another, or directly interacted.
Comparing the rock strata, paleoclimates, and ancient landscapes where their fossils were entombed.
Colorado, Utah, Wyoming
North America
Solnhofen, Bavaria, Germany
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.