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Direct Paleobiological Analysis
Baryonyxvs.Acrocanthosaurus
A side-by-side scientific comparison of physiological dimensions, biomechanics, temporal horizons, and anatomical specializations.
Comparing 2 of maximum 4 specimens
TheropodaBaryonyx
Baryonyx walkeri Charig & Milner, 1986
A specialized fish-eating spinosaurid from Early Cretaceous England sporting a 31-centimeter curved thumb claw.
TheropodaAcrocanthosaurus
Acrocanthosaurus atokensis Stovall & Langston, 1950
A high-spined North American apex predator famous for hunting sauropods across Early Cretaceous river valleys.
Comparative Paleobiological & Anatomical Matrix
| Feature / Trait | Baryonyx | Acrocanthosaurus |
|---|---|---|
Total Length | 7.5–9.5 m (24.6–31.2 ft) Estimated maximum | 10–11.5 m (32.8–37.7 ft) Estimated maximum |
Hip Height | 2.2–2.8 m (7.2–9.2 ft) Model estimate | 3.4–4 m (11.2–13.1 ft) Model estimate |
Body Mass | 1.2–2.0 metric tons (2,646–4,409 lbs) Volumetric/allometric model | 4.5–6.5 metric tons (9,921–14,330 lbs) Volumetric/allometric model |
Epoch Horizon | Cretaceous Period 130–125 Ma (million years ago) | Cretaceous Period 113–110 Ma (million years ago) |
Diet & Trophic Role | Piscivore Piscivorous and carnivorous; consumed fish (Lepidotes) and juvenile ornithopods. | Carnivore Hunted sauropods like Sauroposeidon and ornithopods like Tenontosaurus. |
Taxonomic Clade | Theropoda(Suborder) | Theropoda(Suborder) |
Fossil Localities | Weald Clay Formation, Surrey, United Kingdom Named: 1983 | Antlers Formation, Atoka County, Oklahoma, United States Named: 1940 |
Locomotion & Behavior | Specialized semi-aquatic piscivore and opportunistic carnivore that used its elongated snout and recurved thumb claw to hook large fish. It inhabited the subtropical Wealden floodplain alongside robust herbivorous ornithopods like [Iguanodon](/dinosaurs/iguanodon) and closely allied Wessex spinosaurids like [Ceratosuchops](/dinosaurs/ceratosuchops). | Apex pursuit predator that shared the Early Cretaceous coastal plain ecosystem with contemporary dromaeosaurids like [Deinonychus](/dinosaurs/deinonychus) and large ornithopods like [Tenontosaurus](/dinosaurs/tenontosaurus). Trackway assemblages and body fossils indicate it operated as the dominant carnivore across these ancient river deltas. |
Holotype & Fossils | Nearly complete holotype skeleton with intact skull, massive claws, and stomach contents at NHM London. | Spectacular complete specimen 'Fran' (NCSM 14345) mounted at the North Carolina Museum of Natural Sciences. |
Paleontological Uncertainty Advisory: Anatomical dimensions, body masses, and metabolic rates are scientific estimates derived from volumetric scaling, laser scanning, and biomechanical limb bone allometry. Missing traits indicate non-preserved fossil elements rather than anatomical absence.