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Stegosaurus ungulatus can be distinguished from S. stenops by the presence of longer hind limbs, proportionately smaller, more pointed plates with wide bases and narrow tips, and by several small, flat, spine-like plates just before the spikes on the tail. These spine-like plates appear to have been paired, due to the presence of at least one ...
Thagomizer on mounted Stegosaurus tail. A thagomizer (/ ˈ θ æ ɡ ə m aɪ z ər /) is the distinctive arrangement of four spikes on the tails of stegosaurian dinosaurs. These spikes are believed to have been a defensive measure against predators. [1] [2] The arrangement of spikes originally had no distinct name.
Stegosaurus stenops had four dermal spikes, each about 60–90 cm (2–3 ft) long. Discoveries of articulated stegosaur armor show that, at least in some species, these spikes protruded horizontally from the tail, not vertically as is often depicted. Initially, Marsh described S. armatus as having eight spikes in its tail, unlike S. stenops ...
The longest spike was 86 centimeters long. Its point was broken and it is estimated the original length of the bone core at 985 millimeters. In 2019, the genus Alcovasaurus was considered a junior synonym of Miragaia [38] Alcovasaurus longispinus Hesperosaurus mjosi Stegosaurus stenops Stegosaurus ungulatus: Hesperosaurus [7] H. mjosi [7]
Its array of plates and spikes has been the subject of much speculation. The spikes were most likely used for defense, while the plates have also been proposed as a defensive mechanism, as well as having display and thermoregulatory functions. Stegosaurus had a relatively low brain-to-body mass ratio. It had a short neck and small head, meaning ...
The massive specimen, named Apex, will be on display at the American Museum of Natural History for four years, the museum said.
Skeletal mount of Stegosaurus. This timeline of stegosaur research is a chronological listing of events in the history of paleontology focused on the stegosaurs, the iconic plate-backed, spike-tailed herbivorous eurypod dinosaurs that predominated during the Jurassic period.
A Stegosaurus skeleton described as the “most complete and best preserved” of its kind ever discovered is expected to fetch up to $6 million at auction this summer – but not everyone is ...