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Amargasaurus (/ ə ˌ m ɑːr ɡ ə ˈ s ɔː r ə s /; "La Amarga lizard") is a genus of sauropod dinosaur from the Early Cretaceous epoch (129.4–122.46 mya) of what is now Argentina.The only known skeleton was discovered in 1984 and is virtually complete, including a fragmentary skull, making Amargasaurus one of the best-known sauropods of its epoch.
Dicraeosauridae is a family of diplodocoid sauropods who are the sister group to Diplodocidae.Dicraeosaurids are a part of the Flagellicaudata, along with Diplodocidae.. Dicraeosauridae includes genera such as Amargasaurus, Suuwassea, Dicraeosaurus, and Brachytrach
The sauropod fauna of the La Amarga Formation was diverse and included the basal rebbachisaurid Zapalasaurus, the dicraeosaurid Amargasaurus, and unnamed remains of basal titanosauriforms. [ 2 ] [ 20 ] The high diversity suggests that different sauropod species exploited different food sources in order to reduce competition.
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Sauropoda (/ s ɔː ˈ r ɒ p ə d ə /), whose members are known as sauropods (/ ˈ s ɔːr ə p ɒ d z /; [1] [2] from sauro-+ -pod, 'lizard-footed'), is a clade of saurischian ('lizard-hipped') dinosaurs. Sauropods had very long necks, long tails, small heads (relative to the rest of their body), and four thick, pillar-like legs.
Amargasaurus cazaui, the only species in the genus, was a large animal reaching 9 to 10 meters (30 to 33 feet) in length, with two parallel rows of tall spines down its neck and back. The spines, taller than in any other known sauropod, probably protruded as solitary structures supporting a keratinous sheath, and may have been used for display ...
Speculative life restoration with body based on the related Amargasaurus. Bajadasaurus is classified as a member of the Dicraeosauridae, a family of sauropod dinosaurs. As with all sauropods, dicraeosaurids were large, four-legged herbivores with a long neck and tail and a relatively tiny head.
Sauropoda is a clade of dinosaurs that consists of roughly 300 species of large, long-necked herbivores and includes the largest terrestrial animals ever to exist. The first sauropod species were named in 1842 by Richard Owen, though at the time, he regarded them as unusual crocodilians.