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Stegosaurus (/ ˌ s t ɛ ɡ ə ˈ s ɔːr ə s /; [2] lit. ' roof-lizard ') is a genus of herbivorous, four-legged, armored dinosaur from the Late Jurassic, characterized by the distinctive kite-shaped upright plates along their backs and spikes on their tails.
Cladogram showing distribution of feathers in Dinosauria, as of 2019. The groups that are marked with scales did not necessarily lack feathers but simply have never been found with feather impressions. The following cladogram is from Xu (2020). [66] Slender monofilamentous integument; Broad monofilamentous integument; Basally joining ...
In all examples, the evidence described consists of feather impressions, except those genera inferred to have had feathers based on skeletal or chemical evidence, such as the presence of quill knobs (the anchor points for wing feathers on the forelimb) or a pygostyle (the fused vertebrae at the tail tip which often supports large feathers). [1]
Dinosaurs were initially cold-blooded, but global warming 180 million years ago may have triggered the evolution of warm-blooded species, a new study found. Study reveals when the first warm ...
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]
Stegosauria is a group of herbivorous ornithischian dinosaurs that lived during the Jurassic and early Cretaceous periods.Stegosaurian fossils have been found mostly in the Northern Hemisphere (North America, Europe and Asia), Africa and possibly South America.
The idea of coming face to face with any spider-like creature is enough to fill any arachnophobe with horror, let alone encountering one with large, spiky legs.
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 ...