Amargasaurus: Profile of a Prehistoric Giant Amargasaurus Amargasaurus (ah-MAR-guh-SAWR-us; “Amarga lizard”) is a genus of dicraeosaurid sauropod dinosaur that lived during the Early Cretaceous period, approximately 129 to 122 million years ago. Its fossils were discovered in what is now Argentina, South America. The name Amargasaurus refers to the La Amarga Formation, the geological formation […]
Amargastegos: Profile of a Prehistoric Giant Amargastegos Amargastegos (Uh-MAR-gah-STEG-oss; “Amarga covered lizard”) Amargastegos is a genus of stegosaurian dinosaur that lived during the Early Cretaceous period, approximately 130 to 125 million years ago. Fossil evidence of this dinosaur has been found in the La Amarga Formation of Neuquén Province, Argentina, in South America. The name
Amargatitanis: Profile of a Prehistoric Giant Amargatitanis Amargatitanis (ah-MAR-gah-tie-TAN-iss; “Amarga Titan”) is a genus of large sauropod dinosaur that lived during the Early Cretaceous period, around 130 to 120 million years ago. Its fossils were discovered in the La Amarga Formation in Neuquén Province, Argentina, in South America. The name Amargatitanis refers to the geological
Amazonsaurus: Profile of a Prehistoric Giant Amazonsaurus Amazonsaurus (AM-uh-zon-SAWR-us; “Amazon lizard”) is a genus of diplodocoid sauropod dinosaur that lived during the Early Cretaceous period, approximately 125 to 100 million years ago. Its fossils were discovered in the Itapecuru Formation in Maranhão State, northeastern Brazil. The name Amazonsaurus refers to the Legal Amazon region of
Ammosaurus: Profile of a Prehistoric Giant Ammosaurus Ammosaurus (AM-mo-SAWR-us; “Sand Lizard”) is a genus of sauropodomorph dinosaur that lived during the Early Jurassic period, approximately 190 to 175 million years ago. Fossils of Ammosaurus have been discovered in North America, specifically in Connecticut and Arizona in the United States. The name Ammosaurus, meaning “sand lizard,”
Ampelosaurus: Profile of a Prehistoric Giant Ampelosaurus Ampelosaurus (AM-peh-loh-SAWR-us; “Vineyard Lizard”) Ampelosaurus is a genus of titanosaurian sauropod dinosaur that lived during the Late Cretaceous period, approximately 70 to 66 million years ago. Its fossils were first discovered in southern France in the late 1980s, near a vineyard, which inspired its name – “ampelos” means
Amphicoelias Amphicoelias (AM-fih-SEEL-ee-us; “hollow on both ends”) is a genus of sauropod dinosaur that lived during the Late Jurassic period, approximately 150 million years ago. Its fossils have been found in the Morrison Formation of North America. The name Amphicoelias refers to its vertebrae, which were concave, or hollowed out, on both the front and
Amtocephale: Profile of a Prehistoric Giant Amtocephale Amtocephale (AM-toh-SEF-ah-lee; “Amtgai head”) is a genus of pachycephalosaurid dinosaur that lived during the Late Cretaceous period, approximately 90 to 85 million years ago (from the Turonian to Santonian stages). Its fossils were discovered in the Gobi Desert of Mongolia. The name refers to the Amtgai locality where
Amtosaurus: Profile of a Prehistoric Giant Amtosaurus Amtosaurus (AMT-oh-SAWR-us; “Amtgai lizard”) Amtosaurus is a genus of dinosaur, initially identified as an ankylosaur (armored dinosaur), that lived during the Late Cretaceous period, roughly 98 to 83 million years ago. Its fossils were discovered in the Gobi Desert of Mongolia. The name Amtosaurus means “Amtgai lizard,” referring
Amurosaurus: Profile of a Prehistoric Giant Amurosaurus Amurosaurus (ah-MOOR-oh-SAWR-us; “Amur lizard”) is a genus of lambeosaurine hadrosaurid dinosaur that lived during the very end of the Late Cretaceous period, about 68 to 66 million years ago. Its fossils were discovered in what is now the Amur region of Far Eastern Russia, near the Amur River,
