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The fact that an animal weighing over 4.5 metric tons (5 short tons) could have a brain of no more than 80 g (2.8 oz) contributed to the popular old idea that all dinosaurs were unintelligent, an idea now largely rejected. [43] Actual brain anatomy in Stegosaurus is poorly known, but the brain itself was small even for a dinosaur. [44]
This too supports the theory that the spikes were used in combat. There is also evidence for Stegosaurus defending itself, in the form of an Allosaurus tail vertebra with a partially healed puncture wound that fits a Stegosaurus tail spike. [53] Stegosaurus stenops had four dermal spikes, each about 60–90 cm (2–3 ft) long. Discoveries of ...
Thyreophora includes two major subgroups, Ankylosauria and Stegosauria. In both clades, the forelimbs were much shorter than the hindlimbs, particularly in stegosaurs. Thyreophora has been defined as the group consisting of all species more closely related to Ankylosaurus and Stegosaurus than to Iguanodon and Triceratops.
The authors also reported the existence of Maastrichtian stegosaur remains, but they did not describe these fossils. [1] Michael Seidel argued that while the plates of Stegosaurus were used to help regulate its body temperature, they were actually used to absorb heat rather than lose it as argued by Farlow and others in 1976. [4]
In 1896, Marsh calculated ratios between brain weight and body weight of seven species of dinosaurs, showing that the brain of dinosaurs was proportionally smaller than in today's crocodiles, and that the brain of Stegosaurus was smaller than in any living land vertebrate. This contributed to the widespread public notion of dinosaurs as being ...
People like to joke that a stegosaurus, for instance, had a brain the size of two hot dogs. But scientists say that it was only the size of a walnut shell. #28. Image credits: ralph_the_rex #29.
But not always. Sometimes we get lucky—like a team did recently, when they located a fossil of a 520-million-year-old worm larva that still had its brain and guts intact. “It’s always ...
The nearly complete fossilized remains of a stegosaurus fetched $44.6 million at auction Wednesday, Sotheby's said. The fossil, dubbed “Apex,” is considered to be among the most complete ever ...