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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 30–35 m (98–115 ft) long and weighing 65–80 t (72–88 short tons).
Size is an important aspect of dinosaur paleontology, of interest to both the general public and professional scientists. Dinosaurs show some of the most extreme variations in size of any land animal group, ranging from tiny hummingbirds , which can weigh as little as two grams, to the extinct titanosaurs , such as Argentinosaurus and ...
Brachiosaurus is estimated to have been between 18 and 22 meters (59 and 72 ft) long; body mass estimates of the subadult holotype specimen range from 28.3 to 46.9 metric tons (31.2 to 51.7 short tons). It had a disproportionately long neck, small skull, and large overall size, all of which are typical for sauropods.
Macronarians show divergence in the evolution of body size with some members both increasing and decreasing in size from the primitive condition. For example, despite all being in the titanosaur clade, Argentinosaurus reached enormous sizes (~50 tons), while Saltasaurus and Magyarosaurus reached only 1.5-3 metric tons, which is fairly small for ...
However, research published in 2015 speculated that the size estimates of A. fragillimus may have been highly exaggerated. [22] The longest dinosaur known from reasonable fossils material is probably Argentinosaurus huinculensis with length estimates of 35 metres (115 ft) to 36 metres (118 ft) according to the most recent researches.
Argentinosaurus: 1993 Huincul Formation (Late Cretaceous, Cenomanian to Turonian) Argentina: May be the largest known dinosaur Argyrosaurus: 1893 Lago Colhué Huapí Formation (Late Cretaceous, Campanian to Maastrichtian) Argentina: Several remains were historically assigned to this genus, but only the holotype can be confidently assigned to it ...
Brachiosaurus humerus bone. In 1903, Elmer Samuel Riggs described and named Brachiosaurus. In 1904, he created a new sauropod family, the Brachiosauridae. [9] [1] He published a complete description of the phenotype after examining the humerus, femur, coracoid, and sacrum of the Brachiosaurus holotype that had been prepared at the Field ...
Gregory S. Paul initially estimated the size of this specimen at 25 metres (82 ft) in total length, 16 metres (52 ft) in total height and 45 metric tons (50 short tons) in body mass, [18] but later moderated at 23 metres (75 ft) in total length and 40 metric tons (44 short tons) in body mass. [34]