Siamosaurus: Profile of a Prehistoric Giant Siamosaurus Siamosaurus (SY-am-oh-SAWR-us; “Siam Lizard”) Siamosaurus is a genus of spinosaurid theropod dinosaur, formally named Siamosaurus suteethorni, that lived during the Early Cretaceous period, approximately 125 to 113 million years ago. Its fossils were discovered in the Sao Khua Formation in what is now Thailand. The name Siamosaurus means […]
Siamotyrannus: Profile of a Prehistoric Giant Siamotyrannus Siamotyrannus (SY-am-oh-tie-RAN-us; “Siam Tyrant”) is a genus of meat-eating theropod dinosaur that lived during the Early Cretaceous period, about 130 to 125 million years ago. Its fossils were discovered in the Sao Khua Formation in what is now Thailand. The name refers to “Siam,” the old name for
Siats: Profile of a Prehistoric Giant – Dinos and Designs Siats Siats (SEE-ats; “Man-eating monster”) is a genus of large megaraptoran theropod dinosaur that roamed North America during the Late Cretaceous period, approximately 98 million years ago, which is part of the Cenomanian stage. Its fossils were discovered in the Cedar Mountain Formation of Utah,
Sibirotitan: Profile of a Prehistoric Giant Sibirotitan Sibirotitan (sih-BEER-oh-TIE-tan; “Siberian Titan”) is a genus of titanosauriform sauropod dinosaur that roamed the lands of what is now Siberia, Russia, during the Early Cretaceous period, approximately 125 to 120 million years ago. The name Sibirotitan reflects its massive size and its discovery location. This dinosaur was first
Sidormimus: Profile of a Prehistoric Giant Sidormimus Sidormimus (SIGH-dor-MY-muss; “Sidewinder mimic”) is a genus of ornithomimosaurian theropod dinosaur that lived during the Late Cretaceous period, approximately 75 to 70 million years ago, in what is now North America. The name Sidormimus refers to its theorized agile, quick-turning movements, reminiscent of a sidewinder snake, which may
Sierraceratops: Profile of a Prehistoric Giant Sierraceratops Sierraceratops (SEE-air-ah-SAIR-ah-tops; “Sierra horned face”) is a genus of chasmosaurine ceratopsid dinosaur that roamed what is now New Mexico in the United States during the Late Cretaceous period, approximately 72 million years ago. The name Sierraceratops refers to Sierra County, New Mexico, where its fossils were discovered, combined
Sigilmassasaurus: Profile of a Prehistoric Giant Sigilmassasaurus Sigilmassasaurus (SIH-jill-MAS-sah-SAWR-us; “Sijilmassa lizard”) is a genus of large theropod dinosaur that lived during the Late Cretaceous period, specifically the Cenomanian stage, approximately 99 to 94 million years ago. Its fossils, primarily vertebrae, have been discovered in the Kem Kem Beds of Morocco, North Africa. The name refers
Siluosaurus: Profile of a Prehistoric Giant Siluosaurus Siluosaurus (SILL-oo-oh-SAWR-us; “Lizard from the Silk Road region”) is a genus of small ornithopod dinosaur that lived during the Early Cretaceous period, approximately 125 to 100 million years ago. Its fossils were discovered in the Xinminpu Group in Gansu Province, China. The name Siluosaurus honors the famous Silk
Silvisaurus: Profile of a Prehistoric Giant Silvisaurus Silvisaurus (SIL-vih-SAWR-us; “Forest lizard”) is a genus of nodosaurid ankylosaurian dinosaur that lived during the mid-Cretaceous period, from the late Albian to early Cenomanian stages, approximately 105 to 98 million years ago. Its fossils were discovered in the Dakota Formation in Kansas, North America. The name Silvisaurus, given
Similicaudipteryx Similicaudipteryx (sih-MILL-ih-cawd-IP-teh-ricks; “Similar to Caudipteryx”) is a genus of oviraptorosaurian theropod dinosaur that lived during the Early Cretaceous period, approximately 124 to 120 million years ago. Fossils of Similicaudipteryx have been discovered in the Yixian and Jiufotang Formations in Liaoning Province, China. The name reflects its resemblance to another feathered dinosaur, Caudipteryx. Similicaudipteryx was
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