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Argentinosaurus (meaning "lizard from Argentina") is a genus of giant sauropod dinosaur that lived during the Late Cretaceous period in what is now Argentina.Although it is only known from fragmentary remains, Argentinosaurus is one of the largest known land animals of all time, perhaps the largest, measuring 28 m long and weighing 65–80 t (72–88 short tons).
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.
Titanosauria have the largest range of body size of any sauropod clade, and includes both the largest known sauropods and some of the smallest. [25] One of the largest titanosaurs, Patagotitan, had a body mass estimated to be 69 tonnes (76 tons), whereas one of the smallest, Magyarosaurus, had a body mass of approximately 900 kilograms (2,000 lb).
The smallest dinosaur known from adult specimens which is definitely not an avialan is Parvicursor remotus, at 162 grams (5.7 oz) and measuring 39 centimetres (15 in) long. [39] However, in 2022 its holotype was recognized as a juvenile individual. [40]
Size comparison of selected giant sauropod dinosaurs (from left to right): Supersaurus, Argentinosaurus, Diplodocus, Mamenchisaurus, and Sauroposeidon. A mega-sauropod, Maraapunisaurus fragillimus (previously known as Amphicoelias fragillimus), is a contender for the largest-known dinosaur in history.
The first sauropod fossil to be scientifically described was a single tooth known by the non-Linnaean descriptor Rutellum implicatum. [95] This fossil was described by Edward Lhuyd in 1699, but was not recognized as a giant prehistoric reptile at the time. [96] Dinosaurs would not be recognized as a group until over a century later.
Six small non-avian dinosaur eggs, no bigger than grapes, were discovered during a field study in Ganzhou, China, in 2021. These eggs now mark the smallest-ever found in the world.
Bruhathkayosaurus (/ b r uː ˌ h æ θ k eɪ oʊ ˈ s ɔːr ə s /; meaning "huge-bodied lizard") is a controversial genus of sauropod dinosaur found in the Kallamedu Formation of India.The fragmentary remains were originally described as a theropod, but it was later determined to be a titanosaurian sauropod.