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Direct Paleobiological Analysis
Concavenatorvs.Acrocanthosaurus
A side-by-side scientific comparison of physiological dimensions, biomechanics, temporal horizons, and anatomical specializations.
Comparing 2 of maximum 4 specimens
TheropodaConcavenator
Concavenator corcovatus Ortega et al., 2010
A bizarre Early Cretaceous Spanish carcharodontosaurid featuring a sharp humped back and quill knobs on its arms.
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 | Concavenator | Acrocanthosaurus |
|---|---|---|
Total Length | 5.5–6 m (18.0–19.7 ft) Estimated maximum | 10–11.5 m (32.8–37.7 ft) Estimated maximum |
Hip Height | 1.7–2 m (5.6–6.6 ft) Model estimate | 3.4–4 m (11.2–13.1 ft) Model estimate |
Body Mass | 350–500 kg (772–1,102 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 | Carnivore Hunted primitive birds, ornithopods, and contemporary aquatic vertebrates with ziphodont teeth. | Carnivore Hunted sauropods like Sauroposeidon and ornithopods like Tenontosaurus. |
Taxonomic Clade | Theropoda(Suborder) | Theropoda(Suborder) |
Fossil Localities | Las Hoyas, Cuenca, Spain Named: 2003 | Antlers Formation, Atoka County, Oklahoma, United States Named: 1940 |
Locomotion & Behavior | Unusual carcharodontosaurid predator with a pointed dorsal hump and ulnar quill knobs indicating integumentary structures. In the Las Hoyas wetland ecosystem of Early Cretaceous Spain, Concavenator hunted alongside European iguanodontians allied with [Iguanodon](/dinosaurs/iguanodon). | 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 | Virtually complete articulated holotype skeleton with skin and soft tissue impressions (MCCM-LH 6666). | 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.