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SAICHANIA
SALTASAURUS
SALTOPUS
SARCOLESTES
SARCOSAURUS
SAUROLOPHUS
SAUROPELTA
SAUROPLITES
SAURORNITHOIDES
SAURORNITHOLESTES
SCELIDOSAURUS
SCUTELLOSAURUS
SECERNOSAURUS
SEGISAURUS
SEGNOSAURUS
SEISMOSAURUS
SHAMOSAURUS
SHANSHANOSAURUS
SHANTUNGOSAURUS
SILVISAURUS
SINOSAURUS
SPINOSAURUS
STAURIKOSAURUS
STEGOCERAS
STEGOSAURUS
STENOPELIX
STOKESOSAURUS
STRUTHIOMIMUS
STRUTHIOSAURUS
STYGIMOLOCH
STYRACOSAURUS
SUPERSAURUS
SYNTARSUS
 
SCUTELLOSAURUS
Pronunciation: scoo-TEL-oh-SAWR-us  
Translation: Little Shield Lizard
Also Known As:
Description: Herbivore, Bipedal
Order: Ornithischia
Suborder: Thyreophora (not confirmed)
Family:
Height: 2 feet (0.6 meters)
Length: 4 feet (1.2 meters)
Weight:
Period: Early Jurassic


Notes: Scutellosaurus was a small, lightly-armored dinosaur with a tail twice the length of its body and head. It was covered with hundreds of tiny bony knobs set into its skin.


SECERNOSAURUS
Pronunciation: sih-KER-nuh-SAWR-us  
Translation: Severed Lizard, or Separate Lizard
Also Known As:
Description: Herbivore, Bipedal
Order: Ornithischia
Suborder: Ornithopoda
Infraorder: Iguanodontia
Family: Hadrosauridae
Height: 5.5 feet (1.5 meters)
Length: 9.8 feet (3 meters)
Weight:
Period: Late Cretaceous


Notes: The second most primitive hadrosaur known, Secernosaurus was the first to be found in the southern hemisphere.


SEGISAURUS
Pronunciation: SEG-gee-SAWR-us  
Translation: Segi Canyon Lizard
Also Known As:
Description: Carnivore, Bipedal
Order: Saurischia
Suborder: Theropoda
Infraorder: Ceratosauria (not confirmed)
Family: Segisauridae
Height: 2 feet (0.6 meters)
Length: 4 feet (1.2 meters)
Weight:
Period: Early Jurassic


Notes: Found in Segi Canyon, Arizona, Segisaurus was a very small predator. The structure of its legs and tail suggest that it was very swift.


SEGNOSAURUS
Pronunciation: SEG-no-SAWR-us  
Translation: Slow Lizard
Also Known As:
Description: Herbivore, Bipedal?
Order: Saurischia
Suborder: Theropoda
Infraorder:
Family: Therizinosauridae
Height: 10 feet (3 meters)
Length: 21 feet (6.5 meters)
Weight:
Period: Late Cretaceous


Notes: Found in Mongolia, Segnosaurus had a hip structure unlike either the bird-hipped or lizard-hipped dinosaurs. In addition, although it was an herbivore, it had hands clawed like those of a carnivore. These characteristics led to the definition of the segnosaurid family.


SEISMOSAURUS
Pronunciation: size-muh-SAWR-us  
Translation: Earth-Shaking Lizard
Also Known As:
Description: Herbivore, Quadrupedal
Order: Saurischia
Suborder: Sauropodomorpha
Infraorder: Sauropoda
Family: Diplodocidae
Height: 84 feet (25.6 meters)
Length: 150 feet (45.7 meters)
Weight: 200,000 pounds (90,720 kg)
Period: Late Jurassic





Notes: Found in New Mexico, Seismosaurus may prove to be the longest dinosaur known. While Argentinasaurus was probably taller and heavier, Seismosaurus was as long as half a football field. In the absence of good limb bone fossils, some scientists think that its legs were short, giving rise to its description as the "dachshund" of giant dinosaurs. Like other sauropods, Seismosaurus probably used gastroliths to grind its food after swallowing it.


SHAMOSAURUS
Pronunciation: SHAM-uh-SAWR-us  
Translation: Shamo Lizard
Also known as:
Description: Herbivore, Quadrupedal
Order: Ornithischia
Suborder: Thyreophora
Infraorder: Ankylosauria
Family: Ankylosauridae
Height:
Length:
Weight:
Period: Early Cretaceous


Notes: An early Asian armored dinosaur, Shamosaurus had a clubbed tail and extensive body armor.


SHANSHANOSAURUS
Pronunciation: shan-SHAN-uh-SAWR-us  
Translation: Shanshan Lizard
Also Known As:
Description: Carnivore, Bipedal
Order: Saurischia
Suborder: Theropoda
Family:
Height: 3.5 feet (1.1 meters)
Length: 8 feet (2.4 meters)
Weight:
Period: Late Cretaceous


Notes: Found in China, this dinosaur was probably a very agile and fast runner. Its legs were three times as long as its arms, and it had a large wedge-shaped head.


SHANTUNGOSAURUS
Pronunciation: shan-TUNG-o-SAWR-us  
Translation: Shantung Lizard
Also Known As:
Description: Herbivore, Bipedal
Order: Ornithischia
Suborder: Ornithopoda
Infraorder: Iguanodontia
Family: Hadrosauridae
Height: 25 feet (7.6 meters)
Length: 51 feet (15.5 meters)
Weight: 14,000 pounds (6,350 kg)
Period: Late Cretaceous


Notes: Found in Shangtung, China, this dinosaur was one of the largest hadrosaurids. It may have been the largest animal ever to walk on two legs. It is almost identical to the Edmontosaurus of North America except for some features that are related to its size.



SILVISAURUS

Pronunciation: SIL-vee-SAWR-us  
Translation: Forest Lizard
Also Known As:
Description: Herbivore, Quadrupedal
Order: Ornithischia
Suborder: Thyreophora
Infraorder: Ankylosauria
Family: Nodosauridae
Height: 5 feet (1.5 meters)
Length: 13 feet (4 meters)
Weight:
Period: Early Cretaceous


Notes: Found in Kansas, Silvisaurus was a nodosaur. It had bony plates on its back and spikes on its tail and sides. It had large cheek bones and a relatively long neck.



SINOSAURUS

Pronunciation: SYE-nuh-SAWR-us  
Translation: Eastern Lizard
Also Known As:
Description: Carnivore,Bipedal
Order: Saurischia
Suborder: Theropoda (not confirmed)
Family:
Height:
Length: 8 feet (2.4 meters)
Weight:
Period: Early Jurassic


Notes: Sinosaurus is known from fragmentary remains found in Yunan, China.



SPINOSAURUS

Pronunciation: SPY-nuh-SAWR-us  
Translation: Spine Lizard
Also Known As:
Description: Carnivore, Bipedal
Order: Saurischia
Suborder: Theropoda
Infraorder: Tetanurae
Micro-order: Carnosauria
Family: Spinosauridae
Height: 14 feet (4.3 meters)
Length: 40 feet (12.2 meters)
Weight: 14,000 pounds (6,350 kg)
Period: Late Cretaceous





Notes: Found in Egypt, Spinosaurus may have been the largest of theropods, larger even than Tyrannosaurus. This evaluation is based on the fact that the vertebrae of Spinosaurus were 20% larger than those of Tyrannosaurus. Spinosaurus certainly would have appeared larger, due to the sail-like fold of skin that 6-foot spines supported. This sail was probably used for thermal regulation, possibly evidence that not all dinosaurs were warm-blooded.


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