Stegosaurus

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Stegosaurus

(stĕgəsôr`əs) [Gr.,=roof lizard], quadriped ornithischian dinosaurdinosaur
[Gr., = terrible lizard], extinct land reptile of the Mesozoic era. The dinosaurs, which were egg-laying animals, ranged in length from 2 1-2 ft (91 cm) to about 127 ft (39 m).
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 of the late Jurassic period. About 29 ft 6 in (9 m) long, it had short forelegs, four long bony spikes on a flexible tail, and two rows of upright triangular bony plates running along the back, which gave it a serrated profile. The function of the plates is debated. They may have acted as deterrents to predatory dinosaurs, but some scientists have suggested that they were not strong enough to have functioned that way. Other theories are that they helped regulate body temperature by dissipating heat or absorbing solar rays or that they helped members of the species recognize each other. The head of Stegosaurus was small, and the brain weighed about 2.5 oz (71 grams). The front of the mouth was beak-shaped; there were small leaf-shaped teeth in the cheek area. An herbivore, Stegosaurus, along with AnkylosaurusAnkylosaurus
, [Gr.,=crooked lizard], genus of heavily armored, herbivorous quadripedal dinosaurs, the best known of which is the species A. magniventris, the largest and heaviest of the ankylosaurs.
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, belongs to the group of armored dinosaurs, Thyreophora. Fossil skeletons have been found in the Jurassic beds of Colorado, Utah, and Wyoming.
References in periodicals archive ?
Dr Maidment added: "Most stegosaurs we know of, including the Natural History Museum's Sophie, the most complete stegosaur discovered, have been found in Laurasian rock formations.
They'll excavate the stegosaur bones that were left behind.
"Stegosaurs are traditionally reconstructed as feeding on low vegetation because of their small heads, short necks and short forelimbs," said Dr Octavio Mateus, of the New University of Lisbon.
Other features of the bones suggest that they represent Hesperosaurus--an exciting possibility, she notes, because only four other fossils of this stegosaur species have been discovered, all of which are in private collections.
(2010): An Iberian stegosaurs paradise: The Villar del Arzobispo Formation (Tithonian-Berriasian) in Teruel (Spain).
Being easily recognizable would have been a plus for a small-brained dinosaur: At least six different types of stegosaurs with various arrangements of plates and spikes roamed what is now Montana about 150 million years ago.
In addition, a dorsal vertebra and a dermal plate from the Early Cretaceous of Burgos, originally referred to an indeterminate stegosaur (Pereda-Suberbiola et al., 2003), were recently assigned to this genus (Maidment et al., 2008).
If you ever wondered what giant stegosaurs would look like if it sang and played guitar, Shine A Light is the film for you.
Within seconds, a dozen or more "dinosaur" eggs "hatch" into brightly colored baby stegosaurs and triceratops.
"Among the tracks is the only confirmed evidence for stegosaurs in Australia," lead author Steve Salisbury said in the statement from Queensland, which also worked with James Cook University on the project.
With larger collections, other dinosaur groups expected from this site might be spinosaurid theropods, hypsilophodontid-like ornithopods, and armour plates of stegosaurs or ankylosaurs.
The first Brontosaurus was excavated at Como Bluff; later came nodosaurs, stegosaurs, and more.