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[44] While the original analysis didn't focus on titanosaurs, it was utilised during the descriptions of Savannasaurus and Diamantinasaurus, Yongjinglong, an osteology of Mendozasaurus, and redescribing Tendaguria. Fun Titanosaurus Facts For Kids | Kidadl What Is the Biggest Dinosaur? - The Atlantic Arguments revolve around the position of the recovered vertebrae within the vertebral column and the presence of accessory articulations between the vertebrae that would have strengthened the spine. Evidence of it was originally discovered in 1987, when a fossil the size of a fully grown human being was unearthed on a ranch in Argentina. A sauropod subgroup called the Titanosauria contained the largest sauropods. [67] Further updates and modifications were then made by Palbo Gallina & Apestegua in 2011, with the additions of Ligabuesaurus, Antarctosaurus, Nemegtosaurus and Bonitasaura and character updates to match, bringing the total to 77 characters and 22 taxa. The species lived 100 million to 95 million years ago. As a result, the fossilized trackways of titanosaurs are distinctly broader than other sauropods. Significantly contrasting the earlier results, internal relationships of Titanosauria were rearranged. Patagotitans may have been the world's largest terrestrial animal of all time, and weighed up to 77 tons, while Argentinosaurus were similarly gargantuan, and measured up to 40 meters (131 feet . [44], For much of the 20th century, most known species of titanosaurs were classified in the family Titanosauridae, which is no longer in widespread use. Titanosaurs in general, once fully grown, were too large for a big theropod (or group of big theropods) to take down, and would have been avoided in favor of very young titanosaurs and other easier prey (or even carrion). [13] In 2013, William Sellers and colleagues arrived at a length estimate of 39.7 metres (130ft) and a shoulder height of 7.3 metres (24ft) by measuring the skeletal mount in Museo Carmen Funes. [7] By comparison, the complete femora preserved in the other giant titanosaurs Antarctosaurus giganteus and Patagotitan mayorum measure 2.35 metres (7.7ft) and 2.38 metres (7.8ft), respectively. Titanosaurs were widespread. [39] In 2002, Davide Pisani and colleagues recovered Argentinosaurus as a member of Titanosauria, and again found it to be in a clade with Opisthocoelicaudia and an unnamed taxon, in addition to Lirainosaurus. Gigantic dinosaur unearthed in Argentina could be largest land animal ever The osteoderms were certainly far more sparse than those of ankylosaurs, and did not completely cover the back in scutes. Mazzetta and colleagues used regression equations to estimate its original length at 2.557 metres (8.39ft), which is similar to the length of the other femur, and later in 2019 Paul gave a similar estimate of 2.575 metres (8.45ft).