Archives: Species Guides

Carnotaurus vs Rajasaurus

Comparison infographic of Carnotaurus and Rajasaurus showing size, skull anatomy, horns, reduced forelimbs, fossil evidence, and Gondwanan evolution during the Late Cretaceous.

Comparison Quick Info Field Carnotaurus Rajasaurus Scientific Name Carnotaurus sastrei Rajasaurus narmadensis Family Abelisauridae Abelisauridae Major Group Ceratosauria Geological Age Late Cretaceous (72–69.9 Ma) Late Cretaceous (Maastrichtian) Location Argentina India Length 7.5–9 m 6.5–8 m Weight 1.3–2.1 tonnes 1–2 tonnes Locomotion Bipedal Bipedal Skull Ornamentation Paired orbital horns Single midline horn/crest Fossil Completeness Exceptional Partial … Read more

Carnotaurus vs Majungasaurus

Carnotaurus vs Majungasaurus comparison infographic showing size, skull anatomy, horns, forelimbs, fossil evidence, evolutionary relationships within Abelisauridae, and scientific differences between the two Late Cretaceous apex predators.

Comparison Quick Info Field Carnotaurus Majungasaurus Scientific Name Carnotaurus sastrei Majungasaurus crenatissimus Family Abelisauridae Abelisauridae Geological Age Late Cretaceous (72–69.9 Ma) Late Cretaceous (70–66 Ma) Location Argentina Madagascar Length 7.5–9 m 6–7 m Weight 1.3–2.1 tonnes 750–1,200 kg Locomotion Bipedal Bipedal Skull Ornamentation Paired horns Single cranial dome/horn Fossil Record Limited but exceptional Extensive Scientific … Read more

Carnotaurus vs Ceratosaurus

Scientific comparison infographic of Carnotaurus sastrei and Ceratosaurus nasicornis showing body size, skull anatomy, forelimb structure, locomotor adaptations, fossil evidence, and evolutionary differences between the two ceratosaur theropods.

Comparison Quick Info Field Carnotaurus Ceratosaurus Scientific Name Carnotaurus sastrei Ceratosaurus nasicornis Family Abelisauridae Ceratosauridae Major Group Ceratosauria Ceratosauria Geological Age Late Cretaceous (72–69.9 Ma) Late Jurassic (155–148 Ma) Location South America North America, Europe, Africa Length 7.5–9 m 5.5–7.5 m Weight 1.3–2.1 tonnes 500–1,000 kg Locomotion Bipedal Bipedal Scientific Importance Derived Abelisaurid Basal Ceratosaur … Read more

Carnotaurus vs Giganotosaurus

Scientific comparison of Carnotaurus sastrei and Giganotosaurus carolinii showing differences in size, skull anatomy, body proportions, forelimbs, estimated mass, locomotion, and evolutionary adaptations based on fossil evidence.

Comparison Quick Info Field Carnotaurus Giganotosaurus Scientific Name Carnotaurus sastrei Giganotosaurus carolinii Family Abelisauridae Carcharodontosauridae Geological Age Late Cretaceous (72–69.9 Ma) Late Cretaceous (99–95 Ma) Location Patagonia, Argentina Patagonia, Argentina Length 7.5–9 m 12–13 m Weight 1.3–2.1 tonnes 6–8+ tonnes Locomotion Bipedal Bipedal Evidence Quality Exceptional single specimen Multiple important specimens Scientific Confidence High High … Read more

Giganotosaurus Pronunciation: How to Say It and What It Means

Life reconstruction of Giganotosaurus carolinii in Early Cenomanian Patagonia with a fossil skull in the foreground, illustrating the dinosaur behind the name Giganotosaurus.

Quick Info Field Information Species Giganotosaurus carolinii — Saurischia, Carcharodontosauridae Period Late Cretaceous (Cenomanian), approximately 99–97 Ma Pronunciation jih-GAN-oh-toh-SORE-us Name meaning “Giant southern lizard” Language roots Ancient Greek: gigas (giant), notos (south), sauros (lizard) Species name carolinii — honouring discoverer Rubén Dario Carolini Quick Answer Quick Answer: Giganotosaurusis commonly pronounced jih-GAN-oh-toh-SORE-usor JIG-an-oh-toe-SOR-usin English. The name … Read more

How Fast Could Giganotosaurus Run?

Scientifically reconstructed Giganotosaurus carolinii moving across a braided river floodplain in the Candeleros Formation of Patagonia during the Early Cenomanian, illustrating large theropod locomotion and estimated running speed.

Quick Info Field Information Species Giganotosaurus carolinii — Saurischia, Carcharodontosauridae Period Late Cretaceous (Cenomanian), approximately 99–97 Ma Estimated Top Speed Approximately 40–50 km/h (25–31 mph) Estimation Method Biomechanical modelling, limb proportions, and body-mass scaling Locomotion Type Obligate biped Quick Answer Giganotosaurus carolinii is generally estimated to have reached speeds of approximately 40–50 km/h (25–31 mph) … Read more

When Did Giganotosaurus Live?

Scientific reconstruction of Giganotosaurus carolinii in the Candeleros Formation of Patagonia during the Early Cenomanian about 99.6 to 97 million years ago.

Quick Info Field Information Species Giganotosaurus carolinii — Saurischia, Carcharodontosauridae Geological Period Late Cretaceous, Cenomanian Stage Temporal Range Approximately 99–97 million years ago (Ma) Formation Candeleros Formation, Neuquén Group, Argentina Time Before Present Approximately 97–99 million years Separation from T. rex Approximately 30 million years earlier Quick Answer Giganotosaurus carolinii lived approximately 99–97 million years … Read more

What Did Giganotosaurus Eat?

Educational infographic showing Giganotosaurus carolinii as a probable apex predator in the Candeleros Formation ecosystem, highlighting anatomical features associated with carnivory, potential prey including large sauropods, and the braided-river environment of Early Cenomanian Patagonia.

Quick Info Field Information Species Giganotosaurus carolinii — Saurischia, Carcharodontosauridae Period Late Cretaceous (Cenomanian), approximately 99–97 million years ago Diet Category Carnivore (large-prey specialist, inferred) Primary Prey Candidates Large titanosaur sauropods, including Andesaurus delgadoi Feeding Evidence Serrated slicing teeth and ecological context; no confirmed Giganotosaurus-attributed bite marks on sauropod bones have been reported from the … Read more

Carnotaurus vs Allosaurus

Side-by-side scientific comparison of Carnotaurus sastrei and Allosaurus fragilis showing body size, estimated mass, forelimb anatomy, hindlimb proportions, and key anatomical differences between two large theropod predators.

Comparison Quick Info Field Carnotaurus Allosaurus Scientific Name Carnotaurus sastrei Allosaurus fragilis Family Abelisauridae Allosauridae Geological Age Late Cretaceous (72–69.9 Ma) Late Jurassic (155–145 Ma) Location South America North America and Europe Length 7.5–9 m 8.5–12 m Weight 1.3–2.1 tonnes 1.5–3.5 tonnes Locomotion Bipedal Bipedal Evidence Quality Exceptional single specimen Extensive fossil record Scientific Confidence … Read more

Carnotaurus vs Tyrannosaurus rex

Scientific comparison of Carnotaurus sastrei and Tyrannosaurus rex shown at equal scale with a human silhouette, highlighting differences in size, hip height, body mass, skull shape, forelimb reduction, and overall anatomy.

Comparison Quick Info Field Carnotaurus Tyrannosaurus rex Scientific Name Carnotaurus sastrei Tyrannosaurus rex Family Abelisauridae Tyrannosauridae Geological Age Late Cretaceous (72–69.9 Ma) Late Cretaceous (68–66 Ma) Location South America North America Length 7.5–9 m 12–13 m Weight 1.3–2.1 tonnes 8–10+ tonnes Locomotion Bipedal Bipedal Evidence Quality Exceptional single specimen Extensive specimen record Scientific Confidence High … Read more